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 Subject :Gravitational waves and Public..
20-05-2017 04:57:26 
Dileep Sathe
Junior
Joined: 2009-04-30 08:26:47
Posts: 46
Location: Vishrantwadi / Pune / MH /
 
Forum : IAPT Forum
Topic : Gravitational waves and Public

Since last year, the discovery of gravitational waves is at the top of media, many people were expecting the Nobel Physics Prize for the discoverers of these waves. But I had noiticed a snag in the Space-Time Continuum - STC - about 12 years ago and hence I am sceptic about the discovery. Actually, Newton's views of space and time and those of Einstein are quite figgerent but they cound not actually meet to debate. However there was a great unsettled debate on the same, STC, between Philipp Lenard and Albert Einstein in conference in Germany in 1920.  And in January 2005, I witnessed a similar, unsettled debate between a leader of GRG and a common-man in Borivali - a suburb of Mumbai, MH. Above situation inspired me to contribute a Letter to the Editor of Space Research Today, April 2017, p. 35, title: Newton Vs Einstein in 21st century.

This is a good topic for organizing a day-long Discussion Meeting on the STC for undergraduates, post-graduates as well as their teachers. And then their responses can be studied with the help of a questionnaire. I am willing to take full academic responsibility. Any interested college authorities can request for the copy of my Letter in SRT, noted above, to start with. My email: dvsathe@gmail.com, Mobile: 09422321663 Home: 020-65100495

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 Subject :Naming Retrograde Exoplanet..
15-07-2014 01:31:23 
Dileep Sathe
Junior
Joined: 2009-04-30 08:26:47
Posts: 46
Location: Vishrantwadi / Pune / MH /
 
Forum : IAPT Forum
Topic : Naming Retrograde Exoplanet

 Let me tell readers WHY I am interested in naming a *retrograde* exoplanet. There are some astronomers / astrophysicists who feel that exoplanets are turning planetary theories upside down. One such news is on a link of European Southern Observatory for the public, eso1016. 

I am neither of them but as a teacher of students of age 15 to 17 (though now retired) – I think that there is a  conceptual problem in the learning of circular motion and hence in the planetary motion as well. In a sense, our solar system is a troubling one and that is why that problem had remained unnoticed till the beginning of 20thcentury. However, it should have caught attention of teachers 100 years following the discovery of first retrograde moon of Jupiter – Pasiphae – in 1908. For more information, read first two points in a letter to the editor of CHANGE, May-June 2008, p. 5, title: Getting Science Right.

Now the discovery of *retrograde* exoplanets revives and strengthens my stand that, see my letter to the editor of Physics Education, UK, January 2012, p. 132. I hope above brief description can give the reader some idea of WHY I am interested in naming a *retrograde exoplanet*. If you have an idea, just reply on this site. For more discussion feel free to contact me using Home: 020-65100495 Mobile: 09422321663 Email: dvsathe@gmail.com  

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 Subject :Newton's exceptional introspection..
18-04-2014 14:58:34 
Dileep Sathe
Junior
Joined: 2009-04-30 08:26:47
Posts: 46
Location: Vishrantwadi / Pune / MH /
 
Forum : IAPT Forum
Topic : Newton's exceptional introspection

 ‘Uranus and Neptune’: who says scientists don’t go wrong / Prof. Jayant V.  Narlikar / Saptrang / Sakal / Marathi / Pune / 06 April 2014/. Reading this article reminds me of a very exceptional introspection of Newton because just as senior scientists have to consider findings of junior scientists in time seniors have to reconsider their theories also – as and when needed. Such an introspection was done by Newton, let me narrate it for readers.

It is well-known that Newton had put forth his laws of motion in his youth. These are taught all over the world in schools and colleges, even our SSC students do know them well. His laws are quite different from those of Aristotle’s, described about 2300 years ago. However when Newton was about 62, he had expressed the need of reconsidering some ideas of Aristotle. This piece of history is usually not found in prescribed SSC /HSC textbooks of science / physics. However, it was described by Prof. Anthony French – a well-known author of physics books (now 93) from Massachusetts Institute of Technology, MA, USA, in a letter to the editor of American J. of Physics, January 1984. He had raised the question in the title itself: Did Newton forget his own laws of motion? 

On the basis of my own research in *physics education* - spanning  about 40 years - I think that Newton did not forget his laws BUT must of thought of some better ideas. In short, this anecdote does show Newton’s exceptional way of introspection – and we salute him for it. Contact me for more discussion, My Ghar: 020-65100495 Mobile: 09922467861, Email: dvsathe@gmail.com

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 Subject :Physics and Psychology..
27-03-2014 16:10:50 
Dileep Sathe
Junior
Joined: 2009-04-30 08:26:47
Posts: 46
Location: Vishrantwadi / Pune / MH /
 
Forum : IAPT Forum
Topic : Physics and Psychology

 The question of whether humans have discrete cognitive systems operating on different levels has been debated for years. Therefore the recent finding of J. David Smith (J. Psychological Science, February 2014) seems important to me, from the point of view of persistence of Aristotelian think among even leaders of physics – see my letter in our Bulletin, October 2009. 

Anthony P. French (the author of “Newtonian Mechanics”) had contributed a letter in American J. of Physics (January 1984) title: Did Newton forget his own laws of motion? According to that letter, Newton wanted to reconsider some Aristotelian ideas again, when he was around 62. I think the difference in Newton’s own thinking is the result of different cognitive systems in his own mind. In addition, students’ *contrasting* answers to question of circular motion (John Warren, 1971) is also a result of different cognitive systems operating at different levels. Hence I think that David Smith’s investigation can be useful for physics educationists as well.  

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 Subject :Feynman's failing..
13-03-2014 01:46:12 
Dileep Sathe
Junior
Joined: 2009-04-30 08:26:47
Posts: 46
Location: Vishrantwadi / Pune / MH /
 
Forum : IAPT Forum
Topic : Feynman's failing

Feynman’s failings

Lectures of Feynman were never successful as a textbook. So why, a half a century after their publication, do so many physicists keep Richard Feynman’s three volumes within reach? Robert P. Crease has a theory.

Robert has briefly referred to opinions of other leaders like David Goodstein (Caltech), Daniel Kleppner, Robert Kolenkow, Robert Jaffe (all of MIT). And the general opinion is that Feynman’s *Lectures* are useful for faculty – not students.

I am interested in knowing opinions of IAPT members, use Home: 020-65100495, Mobile: 09922467861, Email: dvsathe@gmail.com

 

 

 

 

 

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 Subject :Feynman's failing..
13-03-2014 01:46:12 
Dileep Sathe
Junior
Joined: 2009-04-30 08:26:47
Posts: 46
Location: Vishrantwadi / Pune / MH /
 
Forum : IAPT Forum
Topic : Feynman's failing

Feynman’s failings

Lectures of Feynman were never successful as a textbook. So why, a half a century after their publication, do so many physicists keep Richard Feynman’s three volumes within reach? Robert P. Crease has a theory.

Robert has briefly referred to opinions of other leaders like David Goodstein (Caltech), Daniel Kleppner, Robert Kolenkow, Robert Jaffe (all of MIT). And the general opinion is that Feynman’s *Lectures* are useful for faculty – not students.

I am interested in knowing opinions of IAPT members, use Home: 020-65100495, Mobile: 09922467861, Email: dvsathe@gmail.com

 

 

 

 

 

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 Subject :A teacher's question..
04-03-2014 05:33:13 
Dileep Sathe
Junior
Joined: 2009-04-30 08:26:47
Posts: 46
Location: Vishrantwadi / Pune / MH /
 
Forum : IAPT Forum
Topic : A teacher's question

 Prof. Govind Swarup gave a lecture on the occasion of National Science Day, in the Abasaheb Garware College, Pune – under the auspices of some NGOs including the IAPT. During questions-answers, a lecturer from the Fergusson College raised the question: When electrons started revolving round nucleus? The lecturer is in his 40s and teaching for many years and so, taken on face value, any teacher can feel that the answer to it is in Bohr’s theory of hydrogen atom. 

 

However, I am not surprised by this question because I am very well aware of global / chronic problems in learning basic that is SSC / JSC level mechanics. One can read my essay, in memory of Prof. Abdus Salam, http://old.iupac.org/puvlications/cei/vol2/pdfs/0201x0026.pdf Alternatively, discuss with me using home: 020-65100495 or email:  dvsathe@gmail.com

 

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 Subject :Commonwealth Science conference..
24-12-2013 17:24:06 
Dileep Sathe
Junior
Joined: 2009-04-30 08:26:47
Posts: 46
Location: Vishrantwadi / Pune / MH /
 
Forum : IAPT Forum
Topic : Commonwealth Science conference

 As per my research in global and chronic problems in "learning" basic concepts of physics - like the circular motion - I think devoting a special session on learning school mechanics - that is "O" level mechanics will be certainly useful for the success of the proposed conference. The need of session is evident in the fact that year 2005 was cekebrated as the Albert Einstein Year for the popularization of physics. Visit for more information

http://zeenews.india.com/news/science/sir-paul-nurse-the-geneticist-in-search-of-his-own-genetics_898807.html

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 Subject :Mars: mission OR obsession..
05-11-2013 16:12:39 
Dileep Sathe
Junior
Joined: 2009-04-30 08:26:47
Posts: 46
Location: Vishrantwadi / Pune / MH /
 
Forum : IAPT Forum
Topic : Mars: mission OR obsession

 

On 21 February 2013, a story appeared on the Scientific American. It was written by John Matson, title: Has NASA become Mars obsessed? I do feel like that, see my comment – made on the same day on the same website, also copied below. 

Yes, I do think that NASA has become obsessed with Mars. Moreover, I think that ISRO (NASA's Indian counterpart) will eventually get dragged in this obsession willingly. I wonder how scientists ignore the fact that living on Mars, just like living on Earth, is very difficult because the gravity of Mars is much weaker than that of Earth - that is nearly 1/3 of Earth's gravity.

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 Subject :From a lone biochemist in physics education..
29-10-2013 15:35:34 
Dileep Sathe
Junior
Joined: 2009-04-30 08:26:47
Posts: 46
Location: Vishrantwadi / Pune / MH /
 
Forum : IAPT Forum
Topic : From a lone biochemist in physics education

Individualism: The legacy of great physicists

Ricardo Heras October 2013

http://scitation.aip.org/content/aip/magazine/physicstoday/news/10.1063/pt.5.2003 

Early this week, Ricardo Heras (a young graduate, astrophysics, UCL) contributed above story in the Physics Today. In response to that, I made a comment on entitled: From a lone biochemist in physics education. Perhaps it will be useful for visitors of I.A.P.T. forum. Feel free to discuss more with me using dvsathe@gmail.com or using mobile: 09922467861.

 

 

 

 

 

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 Subject :God, physicists, public..
25-09-2013 16:37:34 
Dileep Sathe
Junior
Joined: 2009-04-30 08:26:47
Posts: 46
Location: Vishrantwadi / Pune / MH /
 
Forum : IAPT Forum
Topic : God, physicists, public

 God particle divides physicists, what educators should do?

On 5th September, Neil Turok gave the welcome speech to this year’s batch of Perimeter Scholars International http://blog.physicsworld.com/2013/09/12/perimeter-institute-welcome-speech-reignites-the-string-wars/#more-6146 The youngest member in the batch was Jacob Barnett, age just 15. Neil Turok mainly focused on Jacob but his message was for whole class and for the international physics community, in general. Neil Turok’s observation, that appealed me most, was that theoretical physicists were very sad and confused, after the conclusion of experiment of finding God particle at the CERN, - but experimentalists were very happy. I am following the developments in fore-front physics for many years because that is useful for doing counseling along with teaching introductory physics in schools / colleges level. Neil Turok’s speech reminds us of two more recent stories i) Martin Perl’s recent reflection (28 January 2013) on the future of high energy physics, www.martinperl.com/... ii) a recent story suggests physics needs new ideas, www.scientificamerican.com/article.cfm?id=supersymmetry-fails-test-forcing-physics-seek-new-idea Therefore, I would like to focus in this letter on what teachers / educators should do in the next 50 years. 

 

 

First of all, I would like to note the difference between two young teens, Jacob and Josie. Although Jacob, noted above, joined the program at Perimeter Institute enthusiastically, Josie in Cambridge left physics and joined biology after studying physics for one year. This happened after the celebration of I.Y.P.  2005. Josie’s reaction forced me to guess why she could have left physics, letter in Physics Education, U.K., July 2007http://iopscience.iop.org/...

 

 

 
Therefore I would request readers to reconsider my earlier letter: Getting scienceright http://changemag.org/Archives/Back%20Issues/May-June%202008/letters-to-editor.html for making teaching of basic mechanics more logical for retaining good students in physics. 
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 Subject :Albert Einstein did miss a basic point..
24-08-2013 06:36:41 
Dileep Sathe
Junior
Joined: 2009-04-30 08:26:47
Posts: 46
Location: Vishrantwadi / Pune / MH /
 
Forum : IAPT Forum
Topic : Albert Einstein did miss a basic point

 Graduates of physics and more learned-people know that Albert Einstein considered the cosmological constant as his greatest blunder. However, recently Mario Livio did not find any document, supporting the fore-going remark of Einstein, as stated by the reviewer of Mario Livio’s book - Physics Today, August 2013. However there is a conceptual point, regarding the retrograde exoplanets, which was missed by Albert Einstein. Of course, such exoplanets were not known in Einstein’s active life-time but retrograde moons of planets were known that time. In view of that challenge in it seems that he did miss an important conceptual point about circular motion - though he did not make a brilliant blunder. 

Also, it can be concluded that although Einstein’s General Relativity originates in the logical incompleteness of Newton’s laws of motion, that incompleteness itself has not been understood completely, as yet, and therefore (1) still there are global and chronic problems in learning circular motion and (2) physics is not adequately popular in the society. Feel free to discuss this matter further with me, using dvsathe@gmail.com

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 Subject :Quota system in NSE exams..
04-11-2012 01:36:26 
sudeshna
Junior
Joined: 2012-11-03 14:16:25
Posts: 1
Location
Forum : IAPT Forum
Topic : Quota system in NSE exams

I am sorry for raising a non-science issue in this forum.

But I am pained to see that a quota system for different states has been introduced to select students from the 1st level National Science Olympiad. What is worse, the quota system is discouraging to precisely those states where from fewer number of students sat for the NSO exam last year.

I am against quotas, but when quotas are there, they are meant to provide advantage to disadvantaged sections.The states quota system is doing the reverse and I believe it will further discourage students from *weak* states from taking the NSEP exam as there are so few openings from them, The quota system is surprisingly heavily biased to students of AP, Rajasthan, Delhi, etc.

RMO has a quota of 30 students per state which is more rational because they finally select only 35 total students.

Many states in the IAPT scheme have a quoat of only 1. So if there are 2 good students, they have no chance.

I request the IAPT office holders to kindly let us know why this arbitrary system that is so biased to a few states was introduced. A quota system is bad, a one which is biased to the more advantaged people is ridiculous. The number of students who take the NSEP exam is not any indication of the size of the student population in the state. Instead IAPT should work towards increasing the popularity of the NSE exams in those states where they are less popular.

I know that many schools in West Bengal may not have had an opportunity of registering for the NSE exams because the materials were not sent to the schools in time. Please publicize the exam, and do not discriminate the students.

 

Sincerely

Sudeshna Sarkar
Professor, Computer Science & Engineering
IIT Kharagpur

 

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 Subject :Understanding Gravity..
19-09-2012 22:04:41 
Dileep Sathe
Junior
Joined: 2009-04-30 08:26:47
Posts: 46
Location: Vishrantwadi / Pune / MH /
 
Forum : IAPT Forum
Topic : Understanding Gravity

 Understanding Gravity

CERN is planning to build a new collider, 80 km long, for understanding gravity. But I oppose this project, in view of following information.

1) Is physics approaching a state of stagnation? Letter in Am.J. Phys., March 1980, p. 175, by C. Sharp Cook. Cook had studied significant discoveries from 1530 to 1970. According to that Letter, increase in discoveries between 1600 and 1940 was roughly exponential p followed by rapid decline in more recent years - despite increase in PhDs and research papers. Hence his conclusion: physics is in the stage of stagnation.

2) Is the gravitational force really weak? My Letter in Physics Education, India, July-September 2001, p, 167. Gravitational force is usually regarded as the weakest force by physicists. However, I felt the necessity of reconsidering this notion due to problems in physics education.

Therefore, I think that before launching such costly projects we must focus attention on the "conceptual aspects" of gravity. Otherwise our global collaborations can turn futile. If necessary, contact me on mobile: 09922467861.

 

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 Subject :Understanding Gravity..
19-09-2012 22:04:41 
Dileep Sathe
Junior
Joined: 2009-04-30 08:26:47
Posts: 46
Location: Vishrantwadi / Pune / MH /
 
Forum : IAPT Forum
Topic : Understanding Gravity

 Understanding Gravity

CERN is planning to build a new collider, 80 km long, for understanding gravity. But I oppose this project, in view of following information.

1) Is physics approaching a state of stagnation? Letter in Am.J. Phys., March 1980, p. 175, by C. Sharp Cook. Cook had studied significant discoveries from 1530 to 1970. According to that Letter, increase in discoveries between 1600 and 1940 was roughly exponential p followed by rapid decline in more recent years - despite increase in PhDs and research papers. Hence his conclusion: physics is in the stage of stagnation.

2) Is the gravitational force really weak? My Letter in Physics Education, India, July-September 2001, p, 167. Gravitational force is usually regarded as the weakest force by physicists. However, I felt the necessity of reconsidering this notion due to problems in physics education.

Therefore, I think that before launching such costly projects we must focus attention on the "conceptual aspects" of gravity. Otherwise our global collaborations can turn futile. If necessary, contact me on mobile: 09922467861.

 

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 Subject :Bohr's theory ..
04-09-2012 17:04:13 
Dileep Sathe
Junior
Joined: 2009-04-30 08:26:47
Posts: 46
Location: Vishrantwadi / Pune / MH /
 
Forum : IAPT Forum
Topic : Bohr's theory

Centenary of Bohr's theory: 2013  in all over India 
Uniform Circular Motion - UCM - is an important topic from school science - being taught for at least 5 years. There is reference to Bohr's theory of atom also. Therefore I suggest to hold appropriate programs, events - especially for secondary and higher secondary students. I am willing to help academically in this activity. So let me give you some information about my research in the global / chronic problems in teaching of Newton's laws of motion.

World-wide observations show that UCM is a very difficult topic to learn and therefore to teach as well. I am mainly concerned with the logical aspects of this topic and related topics like the planetary motion and Bohr's theory. My first letter in the Physics Education, UK, appeared in March 1984 but a good summary can be found in my recent comment on Carl Wieman's (Nobel Laureate) can be found in CHANGE, May-June 2008, p. 5, http://changemag.org/Archives/

In fact, in 1991, I had discussed my work with Abdus Salam (Nobel Laureate) but in 1996 he expired and therefore I could dedicated a lecture in his memory in August 1999 in a symposium in Samarkand, UZBEKISTAN. See the text of my lecture in Chemical Education International, August 2001, http://old.iupac.org/publications/cei/vol2/pdfs/0201x0026.pdf

I think, secondary and higher secondary physics / chemistry have to know these global and chronic problems. And therefore I am willing to give lectures in HSC, SSC shools - all over India. Use my phone: 020-65100495 and mobile: 9922467861 for more quick communication.

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 Subject :Cosmic Repulsion of Einstein..
14-07-2012 17:11:58 
Dileep Sathe
Junior
Joined: 2009-04-30 08:26:47
Posts: 46
Location: Vishrantwadi / Pune / MH /
 
Forum : IAPT Forum
Topic : Cosmic Repulsion of Einstein

As CERN scientists are turning the spotlight on dark matter, I think, it is necessary to look at conceptual aspects, rather than experimental aspects of physics for making proper progress. The necessity is evident in the following remark of Saul Perlmutter, a supernova expert and last year's Nobel Laureate, http://amperefitz.com/saultony.pdf. There he says - Einstein's cosmological constant, the repulsive force equal and opposite to gravity, is alive and well and presently in space between all stars and galaxies. So, according to him, it was not biggest blunder of Einstein.

Regarding the repulsive force in gravity (as conceived by some) there is another Kolkata connection. I had conceived of the gravitational force as the composite of i) mass-dependent attractive force and ii) distance-dependent repulsive force. This was dictated by conceptual problems in teaching. See my letter in the Indian Journal of Theoretical Physics, (of the Institute of Theoretical Physics) Silver Jubilee Volume, March 1977. Or feel free to write me using dvsathe[at]gmail.com

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 Subject :Manufacturers of excellent optical instruments. ..
05-06-2012 22:40:40 
apr
Junior
Joined: 2012-06-05 11:24:18
Posts: 1
Location
Forum : IAPT Forum
Topic : Manufacturers of excellent optical instruments.

 We would like to buy 1. Michelson interferometer 2. Fabry Parrot etelon, 3. Constant deviation spectrometer 4. Spectrometers. There are many manufactrurers are avilable and dilemma is regarding the quality of instrumets provided them. You might have these instruments in your lab. Please five your experience. Please suggest the who provide quality instruments. The discussion will guide us in procuring these equipments. Thanks in advance. 

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 Subject :Killer asteroids..
22-05-2012 00:24:10 
Dileep Sathe
Junior
Joined: 2009-04-30 08:26:47
Posts: 46
Location: Vishrantwadi / Pune / MH /
 
Forum : IAPT Forum
Topic : Killer asteroids

Killer asteroids: According to a news of 17th May 2012, NASA finds 4,700 potentially dangerous asteroids - http://www.globalpost.com/dispatch/news/science/120517/nasa-finds-4700-potentially-dangerous-asteroids Isn't it an alarming news? Chinese scientists of the Tsinghua University are proposing to send a rocket, for defending our mother Earth, in a "retrograde" direction. So what is meant by retrograde direction? This question will be posed and discussed even in lectures for public and also will give rise to some questions regarding Newtonian mechanics. If you like to know some questions, contact me on dvsathe@gmail.com

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 Subject :Matter does not occupies space...
08-05-2012 03:49:24 
URAIN
Junior
Joined: 2012-05-07 16:09:03
Posts: 1
Location
Forum : IAPT Forum
Topic : Matter does not occupies space.

 It is very happy to share my article with Indian physics teachers

association.

Dear sir, I have discussed about "matter occupying space" in two science forums. Then after as a conclusion I have written a article and science forum is now permitted this article to locate in their forums. Here I have telling that how matter does not occupies space.

 

After reading you will know that, Does matter occupies space or not?
 
 
 Your comments and response is appreciated.
 
Thanking you
 
URAIN
 

 

 

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 Subject :How many planets?..
21-04-2012 16:52:13 
Dileep Sathe
Junior
Joined: 2009-04-30 08:26:47
Posts: 46
Location: Vishrantwadi / Pune / MH /
 
Forum : IAPT Forum
Topic : How many planets?

How many planets might be orbiting the star HD 10180?http://www.dnaindia.com/scitech/report_how-many-planets-might-be-orbiting-the-star-hd-10180_1676706#commentsThis was the question posed ina SciTech story on DNA, dated: 16th April. My comment, dated: 20th April is reproduced below.

This question can not be answered, no one has asked this question in case of our Solar System also. Still then, this is a good question for improving teaching / learning. Actually it has good connection with the new definition of planet - as well as my objection to it. Interested readers can read my letter on p. 19, http://physics.open.ac.uk/~bwjones/IAU46/pdf/IAUNL66.pdf OR contact me directly using dvsathe@gmail.com or on 09922467861 I request readers to debate on it.

 

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 Subject :Teacher evelopment..
07-03-2012 00:01:39 
Dileep Sathe
Junior
Joined: 2009-04-30 08:26:47
Posts: 46
Location: Vishrantwadi / Pune / MH /
 
Forum : IAPT Forum
Topic : Teacher evelopment

On 01 March 2012, Teacher Development came up on the following link. In response, I have raised four points - on 5th March - for the consideration of interested teachers, educationists. I request IAPT members also to visit the link, given below, and react. Feel free to contact me directly, using dvsathe@gmail.com

www.physicstoday.org/daily_edition/points_of_view/strengthening_k-12_science_education_through_teacher_development

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 Subject :India Vs Bharat..
27-02-2012 17:56:40 
Dileep Sathe
Junior
Joined: 2009-04-30 08:26:47
Posts: 46
Location: Vishrantwadi / Pune / MH /
 
Forum : IAPT Forum
Topic : India Vs Bharat

India Vs Bharat

Sinhgad Institute of Business Administration and Research is organizing a conference on India Vs Bharat - focus on the great disparity in our country and how to reduce it. Curiously my paper: Computer Assiste Learning: a cause of divide has been accepted for presentation, on 9th March morning, 15 mins.

Actually, I am seeing every one (almost) praising Mahatma Gandhiji but no one (almost) uses the principle of simplicity. On the other hand half of my research in physics education is based on the principle of simplicity. In fact, lack of funds is a boon - not bane - for my research.

Interested readers can contact me i) first preference: by home phone + SMS: 020-65100495 OR  ii) by cell phone: 09922467861 iii) last preference: dvsathe@gmail.com

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 Subject :Greatest living physicist..
10-01-2012 18:04:14 
Dileep Sathe
Junior
Joined: 2009-04-30 08:26:47
Posts: 46
Location: Vishrantwadi / Pune / MH /
 
Forum : IAPT Forum
Topic : Greatest living physicist

On 5th January 2012, the Physics World posed the question: Who is the greatest living physicist? and suggested readers to cast vote on the facebook page of Physics World. My vote is in favor of Frank Wilczek, with the reason also. See my comment on the face book and respond.

http://physicsworld.com/blog/2012/01/who_is_the_greatest_living_phy.html

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 Subject :Last transit of Venus..
26-12-2011 16:31:58 
Dileep Sathe
Junior
Joined: 2009-04-30 08:26:47
Posts: 46
Location: Vishrantwadi / Pune / MH /
 
Forum : IAPT Forum
Topic : Last transit of Venus

An Appeal from Dileep V. Sathe / Retired HSC Teacher regarding *Transit of Venus in June 2012*

  The *last* transit of this *21st century* will be in June 2012. This is can happen because the radius of orbit of Venus is less than the radius of orbit of Earth. The question is how to prove validity of the fore-going statement? For proving this, it is possible to couple a theorem of school geometry with the observations of moon. The said coupling can be understood with the help of a very simple model, which I made in 2004 at the time of earlier transit of Venus. Then I discussed the same with Prof. Robert H. Olley in January 2009. Visit the following link and click on 'the picture' (in blue ink) in Prof. Olley's comment of 17th January to see my photo with model.
http://www.science20.com/news_releases/international_year_astronomy_2009_perfect_chance_learn_astronomy

I am willing to come to your *school / housing colony* to explain basic relevant astronomy - *preferably before June 2012*. *I do not expect any honorarium* - but do expect money for reasonably comfortable travel and provision for stay. I am 64 presently and a *vegetarian*.

 

Thanks for your attention and contact me using Phone/SMS: on 020-65100495 Mobile: 09922467861 Email: dvsathe@gmail.com . Also spread the message in your area. 

 

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 Subject :Physics in India..
20-12-2011 02:35:07 
Dileep Sathe
Junior
Joined: 2009-04-30 08:26:47
Posts: 46
Location: Vishrantwadi / Pune / MH /
 
Forum : IAPT Forum
Topic : Physics in India

Title: Changes and Challenges: Physics in India
Author: Toni Feder
Publication: Physics Today / December 2011 / 26
Site: http://www.physicstoday.org/resource/1/phtoad/v64/i12/p26_s1?bypassSSO=1
Prof. Obaid Siddiqi's (FRS Date of Birth: 07 January 1932) - his quotation:
In the old days we had no money but we had people. Today, we have the money but not the people.

I think, this article deserves attention of all IAPT members.

 

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 Subject :2015: IYL..
28-11-2011 17:00:49 
Dileep Sathe
Junior
Joined: 2009-04-30 08:26:47
Posts: 46
Location: Vishrantwadi / Pune / MH /
 
Forum : IAPT Forum
Topic : 2015: IYL

Friends, recently EPS has taken initiative to declare the year 2015 as the IYL - the International Year of Light, visit: 1) www.epsnews.eu/2011/09/passion-for-light-webcast  and see my comment of 18th September also. This is good opportunity for teachers, particularly, for motivating HSC students to take up challenges of optics - particularly of HSC level. As I have contributed 4 notes on optics of prism, I would like to give a lecture based on them to explain students how one can do research in apparently very simple subject of HSC level, using school geometry. Details of notes are
1) A simple method for the refractive index of a prism, 'The Physics Teacher' (of the A.A.P.T.) November 1978,
2) Fixed-angle of incidence method for the refractive index of a prism, 'American J. of Physics' (of the A.A.P.T.) May 1985,
3) An alternative for the angle of minimum deviation, Bulletin of the I.A.P.T., August 1987 and
4) An alternative derivation fot he prism formula, Bulletin of the I.A.P.T., April 1988. Feel free to email me on dvsathe[at]gmail.com or talk on phone at home 020-65100495 or on mobile 09922467861.

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 Subject :Rising tide of anti-Jobs: angel or tyrant..
04-11-2011 15:10:05 
Junior
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Location
Forum : IAPT Forum
Topic : Rising tide of anti-Jobs: angel or tyrant

  Negative comments   Steve Jobs's death in October 5, after the publication of a variety of warm obituary will follow. "San Jose Mercury News" published an article entitled "Silicon Valley dazzling Sun King" of condolence. His name also appeared in "Time" magazine's Person of the Year standings, although this honor is usually awarded only living person. The notoriously harsh Gawker also used a very serious tone.   Although only the "death of Steve Jobs," a simple subject, but Gawker is still in this 1200 word long article, wrote: "Steve Jobs is difficult to use language to describe the achievements."   This tone continued for 18 hours. To the next day 14:00, Gawker has published an article entitled "Steve Jobs is not God," the article. The site said: "If you like Apple products, that's fine, but they are just the product, without a soul, not a hero, their creators are not the same hero, no matter how high his ability."   Not only is Gawker, published after the first wave of the eulogy, the situation soon changed. Thanks to the help of Facebook and Twitter, all of the people unhappy with Steve Jobs and Apple have a platform that can target the industrial giant and pop star, who is also the dual role of human Chen own opinions.   Spread rapidly   Jobs with the wave of anti-god Steve Jobs wave as quickly. Just as people have to stand in front of Apple retail stores worldwide vigil for the Jobs, the blog authors began to attack.   "What is a good man Steve Jobs, CEO or Wall Street villain child care?" Wall Street site occupied by a writer asked. Subsequently, the "Forbes" Online technology columnist David Cousy (David Coursey) and wrote that "Steve Jobs is a moron, do not learn from him." He said in this article, Steve Jobs may have become "a marginalized anti-social elements."   There had also been encountered after the death of a legend of the coexistence of praise or blame. John Lennon (John Lennon) 1980 was the murder, the news media often portrayed him as Jesus, guitar, and he will be called tabloid odds with Paul's drug addicts.   However, in the "New York Magazine," the former editor, novelist Kurt Anderson appears, from angel to devil Jobs that dramatic changes are of particular concern. "The most obvious is the news spread, or both for the existing heritage value." He said.   On Twitter, despite the large number of avi to DVD burner wase published eulogies, but who do not believe that Steve Jobs can also be circulated to the large number of Jobs is the "tyrant", "villain boss", "perfect control" remarks.   The mainstream media   Mainstream media also cleared his throat, stroked a stroke tie, then added to the camp to go.   Just five days after the death of Steve Jobs, the British magazine "The Week" in an article devoted to various kinds of "anti-Steve Jobs," the report was a summary, including "Atlantic Monthly 'writer Grundy (DB Grady ) of the "bad guys Steve's mantra," the British "The Mail" magazine survey of the 2010 article, "Chinese sweatshops" and the one-man show actor Mike Daisy (Mike Daisey) in the "New York Times" Op-Ed column Apple's Orwellian strategy of attacking the article. Grandis that Steve Jobs is not a saint, but a cruel dreamer; "The Mail" on the iPod-generation plant has been disclosed in the case; Daisy said: "No one technology company to own more of it than the Apple In 1984, advertising in the shape of 'Big Brother' image. "   Jobs on the mood of the anti-Daisy is no stranger. Following a 14-month tour, he wrote and starred in the drama impromptu horn, "Steve Jobs of pain and ecstasy," just on October 17 in the New York premiere. This drama criticized Apple and other technology companies in the harsh environment of the factory.   Daisy said that although the New York premiere of time is purely a coincidence, but a lot of letters he received threatening letters and a number of death threats. However, he was not afraid.   "We can no longer serious consideration, he really is a genius?" He said, "because he never knew the dark side and his life's complexities, you seem to be blinded, so the picture does not understand the whole story . "   Biography value   Fortunately, there is Walter Isaacson (Walter Isaacson) up to 630 authorized biography of Steve Jobs "Steve Jobs Biography." Although this book is hardly a vicious attack, but it does for the blog authors provide a new perspective to look at Steve Jobs. For example, Steve Jobs at Apple early stages of development have been treated fairly in the stock options on an early employee of the company and his friends.   But for two and a half the book devoted efforts of Isaacson has said, just select from a number of negative anecdotes Steve Jobs Steve Jobs not only unfair, this book also unfair.   "This book want to show is that he has created a very loyal and popular that he inspired the team, he also has a very happy family." He said, "Ultimately, you need to judge him based on the results."
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 Subject :Pass a comprehensive reform of the second half of Apple..
04-11-2011 15:08:43 
Junior
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Forum : IAPT Forum
Topic : Pass a comprehensive reform of the second half of Apple

according to DigiTimes Taiwan's technology website reported on Thursday, Apple said Apple plans to upstream suppliers in large-scale reform of its 2012 product line, including the iPad, iMac, iPhone and MacBook Air, and expected to be completed by December this year the key parts of the new iPad orders.   The source pointed out that the key parts of the stock of new iPad end of this year to meet the needs of production ofavi converter for Mac.   The sources, Apple has asked the supplier in accordance with two code-named "J1" and "J2" The iPad prototype flat-panel modules and LED light bar.   The source said that touch panel makers Chen Hong (TPK Holdings) will begin in November for the Apple touch-screen production. Another touch screen supplier Wintek will also begin shipping in December. However, the new iPhone and the iMac at least until the second half of 2012.
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 Subject :Neptune's first revolution..
12-07-2011 12:01:05 
Dileep Sathe
Junior
Joined: 2009-04-30 08:26:47
Posts: 46
Location: Vishrantwadi / Pune / MH /
 
Forum : IAPT Forum
Topic : Neptune's first revolution

Neptune is completing its first revolution around the Sun - the present breaking news in astronomy. But every one knows how difficult it is to see planets of our solar system, beyond Saturn. This difficulty prevented one feather entering in the cap of Galileo Galliei, here is an anecdote for the IAPT members. Galileo Galliei observed Neptune twice, first on 28th December 1612 and then again on 27th January 1613 but misunderstood it as a fixed star because Neptune had just started with its retrograde motion - that is the motion from west to east as observed from Earth. As a planet changes motion from forward to retrograde, it appears steady for a few days and hence Gelileo Galliei's misunderstanding. In a sense, our solar system is a troubling one as it does not contain any real-retrograde planet but does contain some real-retrograde moons around planets like Jupiter and Saturn. This situation poses a great conceptual problem in the H.S.C. physics. For more information, contact dvsathe@gmail.com

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 Subject :Exoplanets revive old challenge..
26-05-2011 17:18:30 
Dileep Sathe
Junior
Joined: 2009-04-30 08:26:47
Posts: 46
Location: Vishrantwadi / Pune / MH /
 
Forum : IAPT Forum
Topic : Exoplanets revive old challenge

According to a recent story on the Physics World (12th May 2011) some exoplanets are orbiting their respective parent stars in a retrograde manner, which is puzzling some astrophysicists - http://physicsworld.com/cws/article/news/45961#comments In my opinion (dated 14th May) on that story the recent finding revives a 100-year old conceptual challenge. For more information either feel free to contact me on <dvsathe@gmail.com> or read my Letter in the CHANGE, May-June 2008, p. 5, http://changemag.org/Archives/...

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 Subject :Lesson from present Lucasian Professor Michael Green..
26-03-2011 16:42:57 
Dileep Sathe
Junior
Joined: 2009-04-30 08:26:47
Posts: 46
Location: Vishrantwadi / Pune / MH /
 
Forum : IAPT Forum
Topic : Lesson from present Lucasian Professor Michael Green

Title: Less 'drudgery' and more 'glamour': Stephen Hawking's successor demands changes to formula for maths and physics teaching http://www.tes.co.uk/article.aspx?storycode=6074315 - dated: 25 March 2011. Also see my comment of the same day.

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 Subject :Physics: Unification + 150..
23-03-2011 16:53:25 
Dileep Sathe
Junior
Joined: 2009-04-30 08:26:47
Posts: 46
Location: Vishrantwadi / Pune / MH /
 
Forum : IAPT Forum
Topic : Physics: Unification + 150

On 16th March, a story appeared in the Nature News, entitled: Physics: Unification + 150. I have commented on it on 19th March, based on my short note in the Physics Education (IAPT) July-Sept. 2001, p. 167. This is an important issue from the point of view of physics as well as   education. Interested teachers may feel free to contact me by sms on i) 020-65100495 or 09922467861 or email on dvsathe[at]gmail.com

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 Subject :Joshi n Panchang..
14-01-2011 00:37:42 
Dileep Sathe
Junior
Joined: 2009-04-30 08:26:47
Posts: 46
Location: Vishrantwadi / Pune / MH /
 
Forum : IAPT Forum
Topic : Joshi n Panchang

Joshi n Panchang
A.W. Joshi gave some lectures on Indian almanac and ephimeries [more popularly called panchang in Marathi] in the Physics Dept. of Pune Univ. about 15 years ago. Therefore, I started making very simple models, using common items at home, for motivating school children to make such models and learn maths, geography, physics, astronomy and cross borders between them. One such model, by which one can combine school geometry n basic information of our solar system. The comment of Prof. Robert Olley - 17 January 2009 - can be used to view my model, on the following site:
http://www.science20.com/news_releases/international_year_astronomy_2009_perfect_chance_learn_astronomy                                                    
I am willing to show such models, in a lecture for the students of Std. VIII to XII, if any one is arranging an event in his memory on the occasion of his first death anniversay which falls on 01-July-2011. Of course, my lecture will be useful for senior college students and public as well. In addition to this, I can guide a small group of students to actually make some models. My presentation will be of about 1 hr. Feel free to contact me using, home: 020-65100495 Mobile: 09922-467-861 Email:
dvsathe@gmail.com

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 Subject :International Year of Chemistry..
05-12-2010 22:47:15 
Dileep Sathe
Junior
Joined: 2009-04-30 08:26:47
Posts: 46
Location: Vishrantwadi / Pune / MH /
 
Forum : IAPT Forum
Topic : International Year of Chemistry

Bohr's model of hydrogen atom: Learning Bohr's theory is very important for physics and chemistry both. But there are some unique problems, which I have been discussing for some years. So I would be glad in discussing them in a lecture or lead a group discussion of teachers / researchers in a suitable event in your organization. For more details, see my "activity" on www.chemistry2011.org/... or contact me directly on dvsathe[at]gmail.com

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 Subject :Re: Football and Physics..
01-12-2010 17:09:41 
lyssagale12
Junior
Joined: 2010-12-01 05:59:50
Posts: 1
Location
Forum : IAPT Forum
Topic : Football and Physics

That's useful post guys...i m newbie here so thanks for such a useful sharing.

keep sharing more in future.


magic sing

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 Subject :Re: Football and Physics..
22-09-2010 22:34:14 
Junior
Joined
Posts: 0
Location
Forum : IAPT Forum
Topic : Football and Physics

Hmm........nice info u have shared about physics,football & music world.I appreciate with that.

 

Thanks

 

Karaoke Mic

 

 

 

 

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 Subject :Einstein: Physics and Music..
27-07-2010 02:35:19 
Dileep Sathe
Junior
Joined: 2009-04-30 08:26:47
Posts: 46
Location: Vishrantwadi / Pune / MH /
 
Forum : IAPT Forum
Topic : Football and Physics

Recently James Dacey contributed a story on the blog of Physics World - U.K. - based on a story told by Brian Foster, in a recent interview. Foster (a particle physicist from the University of Oxford) talked about how music inspired Einstein and how it offered a form of escapism from his research. Einstein had more pleasure in life from playing the violin than from anything else he did, see http://physicsworld.com/cws/article/multimedia/43252
Currently Brian Foster and Jack Liebeck, the musician, are touring the UK, for delivering special lecture: Einstein's Universe. The lecture is given by Foster himself, interspersed with classical music by Jack Liebeck - which explores Einstein's legacy to physics and the role music played in his life.

This story appealed me lot because I am in the similar situation for nearly 35 years, see my comment on the story, dated: 24th July, on the same link. So I suggest concerned authorities from Physics and Music to try similar activities in India. Feel free to contact me for more information, using 9922-467-861 or dvsathe[at]
gmail.com

Dileep V. Sathe

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 Subject :Sci. & Tech. / MH / 2010 / Std IX..
23-06-2010 19:14:37 
Dileep Sathe
Junior
Joined: 2009-04-30 08:26:47
Posts: 46
Location: Vishrantwadi / Pune / MH /
 
Forum : IAPT Forum
Topic : Football and Physics

From this academic year (2010-11) Board of MH state has introduced the new text of Sci. & Tech. for Std. IX. Reviewing book is a common and good practice but it is time-consuming also. Therefore I have suggested an alternative in today's Sakaal Times - a famous daily from Pune. As a LM of the IAPT, I encourage, particularly, young members to read that letter to the editor, using the link: http://epaper.sakaaltimes.com/SakaalTimes/index.htm Alternatively, any interested person - not limiting to MH, can contact me using: Home + SMS: 020-6510-0495, Mobile: 09922-467-861, Email: dvsathe@gmail.com Also see my post on the site of IAPT, dated: 13th May 2009.

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 Subject :Football and Physics..
13-06-2010 18:23:41 
Dileep Sathe
Junior
Joined: 2009-04-30 08:26:47
Posts: 46
Location: Vishrantwadi / Pune / MH /
 
Forum : IAPT Forum
Topic : Football and Physics

The current fever of FIFA matches, all over the world, is a boon for H.S.C. physics teaching. Teachers, who are now teaching Std. XII physics, can go back to Std. XI - as a part of relaxation. They can give my new but simple exercise to students, from the chapter of projectile motion. I used to give the same for many years to my students, many years ago. Visit:http://physicsworld.com/blog/2010/06/brazilian_wundergoal_revisited.html#comments Or contact me, dvsathe, on the gmail.com or by mobile: 9922467861.
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 Subject :Future of Physics..
02-05-2010 01:53:07 
Dileep Sathe
Junior
Joined: 2009-04-30 08:26:47
Posts: 46
Location: Vishrantwadi / Pune / MH /
 
Forum : IAPT Forum
Topic : Future of Physics

For some months, Prof. David J. Gross (Nobel Laureate, 2004) has been discussing the Future of Physics with reference to 25 questions, most recently he gave a talk in the Shanghai JioTang University on 14th April 2010. I am also concerned with the same topic for a couple years, especially after the celebration of Albert Einstein Year,2005. For example, see my comment, dated: 30 May 2009, on the Scientific American - http://www.scientificamerican.com/article.cfm?id=the-future-of-physics  Interested members can write me directly on dvsathe[at]gmail.com

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 Subject :Newton and apple anecdote..
27-01-2010 01:09:54 
Dileep Sathe
Junior
Joined: 2009-04-30 08:26:47
Posts: 46
Location: Vishrantwadi / Pune / MH /
 
Forum : IAPT Forum
Topic : Newton and apple anecdote

Recently the Royal Society of London made available the original, hand-written anecdote of apple's fall on Newton's head, on the internet. So presently, it is a hot topic of discussion on many websites. My own research in physics education is concerned with that anecdote and have contributed on many of them recently. For example, New Scientist, a well known weekly from London. Please visit the following link to see my comment of 25th January.

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 Subject :Environment..
11-12-2009 20:24:06 
Dileep Sathe
Junior
Joined: 2009-04-30 08:26:47
Posts: 46
Location: Vishrantwadi / Pune / MH /
 
Forum : IAPT Forum
Topic : Environment

Environment, global-warming have become household terms and students of SSC and HSC are required to make some projects on it. Many of them, as per my observation, do not deal with some specific scientific principle. In fact, I have observed that this subject is taught not by any science graduate and therefore this important subject has not properly developed in about 10 years. Actually, I think, teachers of this subject must have done B.Sc. in Physics or Chemistry. The reason for this can be found in my comment on the following link, dated 10th December 2009. Even SSC students can use it fruitfully,in their Exhibition/ Project work. http://physicsworld.com/cws/article/news/41202#comments

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 Subject :With Perl n Kohn on ESVA..
23-10-2009 21:31:12 
Dileep Sathe
Junior
Joined: 2009-04-30 08:26:47
Posts: 46
Location: Vishrantwadi / Pune / MH /
 
Forum : IAPT Forum
Topic : With Perl n Kohn on ESVA

I pointed out a problem in teaching circular motion in 1980 and the other in 1986. Due to those problems in teaching, there are some problems in learning this and related topics, which are global and chronic. I could discuss those problems with Prof. Martin Perl (Nobel Laureate, Physics, 1995) and with Prof. Walter Kohn (Nobel Laureate, Chemistry, 1998) in a conference in SINGAPORE in honour of Prof. C. N. Yang (Nobel Laureate, Physics, 1957). Photos, with those professors and showing my poster, have now been accepted by the ESVA - the Emilio Segre Visual Archives of the A.I.P. One can click the first link, below, to look at those photos. For the summary of my work, see the Letter to the Editor of CHANGE (of the Carnegie Foundation) May-June 2008 on the article of Prof. Carl Wieman (Nobel Laureate, Physics, 2001) on the second link.

1)
http://photos.aip.org/quickSearch.jsp?qsearch=dileep&group=10&submit=GO
2)
www.changemag.org/Archives/...

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 Subject :Chandrasekhar Centenary..
22-09-2009 01:29:47 
Dileep Sathe
Junior
Joined: 2009-04-30 08:26:47
Posts: 46
Location: Vishrantwadi / Pune / MH /
 
Forum : IAPT Forum
Topic : Chandrasekhar Centenary

Our great astrophysicist, Prof. S. Chandrasekhar, was born on 19th October 1910. So his centenary year begins next month. So I suggest IAPT members to popularize his famous limit for the maximum mass of a white dwarf, for which he had received the Nobel Physics Prize in 1983. I have already contributed a tip for quickly summarising this limit with reference to a common example from Biology, in the Physics Education of the IAPT. Interested persons can contact me using: dvsathe.at.gmail.com

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 Subject :How to access older publications of IAPT..
12-09-2009 18:06:38 
praneethns
Junior
Joined: 2009-09-12 06:49:16
Posts: 1
Location
Forum : IAPT Forum
Topic : How to access older publications of IAPT

Hi,

How can i access the older publications of IAPT..(say an year back)

In the website, only the last six months publications are listed and hence accessible..

Regards,

Praneeth.

 

 

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 Subject :ASE..
02-08-2009 01:42:47 
Dileep Sathe
Junior
Joined: 2009-04-30 08:26:47
Posts: 46
Location: Vishrantwadi / Pune / MH /
 
Forum : IAPT Forum
Topic : ASE

Annular Solar Eclipse of 15th January 2010 is going to be the biggest event because Indians will witness the ASE after 120 years. The places of interest are Kanniyakumari, Nagercoil and Tiruanthapuram - all from the State of Kerala. So I looking forward to hear from members of IAPT from that region. Here is a suggestion for organizers.

In Indore, I observed that many organizers had invited researchers to observe the eclipse of 22nd July and conduct advanced research and involved the public to watch act. But in my opinion, organizers should also involve persons dealing with the eradication of superstitions. For example, astronomers and astrologers both consider Rahu n Ketu. So the question is why do they fight? making confusion in the public. I am using a simple, home-made model for 15 years. So, I think, organizers have to include such efforts also.

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 Subject :Re: Longest Solar Eclipse..
27-06-2009 19:54:38 
Dileep Sathe
Junior
Joined: 2009-04-30 08:26:47
Posts: 46
Location: Vishrantwadi / Pune / MH /
 
Forum : IAPT Forum
Topic : Longest Solar Eclipse

Apart from TSE, there will be two more lunar eclipses, one before TSE and other after TSE. But one need not be afraid of the event of triple eclipses. Read the main story and my comment on the following link http://www.dnaindia.com/scitech/report_does-a-triple-eclipse-foretell-a-disaster_1267452

I will be in Indore, giving lecture on the eclipses on 21st July. Any interested IAPT member can come for my lecture. Contact me for details, using Home and SMS: 020-6510-0495 Mobile (when not at home) 9922-467-861 Email: dvsathe@gmail.com  

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 Subject :Acoustic Black Hole..
19-06-2009 16:58:32 
Dileep Sathe
Junior
Joined: 2009-04-30 08:26:47
Posts: 46
Location: Vishrantwadi / Pune / MH /
 
Forum : IAPT Forum
Topic : Acoustic Black Hole

Some physicists are trying to develop acoustic black hole for detecting the Hawking radiation. But I think there are some limitations, which could be understood by comparing Scwarzschild radii. Visit following link http://www.newscientist.com/commenting/browse?id=dn17319

 

 

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 Subject :Longest Solar Eclipse..
11-06-2009 17:20:44 
Dileep Sathe
Junior
Joined: 2009-04-30 08:26:47
Posts: 46
Location: Vishrantwadi / Pune / MH /
 
Forum : IAPT Forum
Topic : Longest Solar Eclipse

We, Indians, will be fortunate in witnessing the longest Solar Eclipse on 22nd July 2009. So, make a simple model and enlighten the public - so that they will not be afraid of Rahu n Ketu and will understand their role in eclipses. Read the story on Sakaal Times, Pune, and my comments on http://www.sakaaltimes.com/2009/06/09141611/Get-ready-to-view-a-total-sola.html
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