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Science through postcards

Science through postcards .........
by Dr. Jayant Narlikar

Book Preface

It is not uncommon that at the end of a public lecture, I am surrounded by autograph-hunters, mostly students. Rather than oblige them with my signature, I decided to try out an experiment, on such occasions. I asked the typical autograph-aspirant to send me a question on a postcard. The question should ideally relate to my talk or, at least, fall within my area of study, namely the science of astronomy. My reply would carry my autograph.

The purpose of this experiment was to filter out the majority of students who were asking for the autograph, just for the fun of it ? and to concentrate my attention only on the few serious ones. For, only the latter would bother to write to me with a question. Although answering them involved some effort on my part (certainly more than scribbling my signature), I enjoyed doing so. The questions came in three languages ? English, Marathi and Hindi.
A few years ago, at the behest of the late Mr. Sharad Naik, Secretary of the Marathi Vidnyan Parishad, a collection of frequently asked questions and my answers, was published as a Marathi booklet. Now at the request of Mr. Anant Deshpande, Secretary MVP, an English translation is being published.

 

I thank my wife Mangala for translating the Marathi version and also for helping me polish the answers. I hope the English version is as successful as the Marathi original.

 

Jayant Narlikar

01.10.2000

About the Book

Whenever Dr. Jayant Narlikar delivered a lecture, people of all age groups including school going children queued up for his autograph. To circumvent this situation, he did an experiment. He started telling children to write him a postcard and ask him a question in Science, based on the lecture he just delivered. He started getting a number of such postcards. The questions asked in such postcards are of a repetitive nature. We have collected 44 such questions and answers of them given by Dr. Jayant Narlikar for the benefit of the students.
The booklet was published twice in Marathi (30 April 1995 and 28 April 1997). Because of a growing demand from children and their parents it is being published for the first time in English. We hope children will welcome this booklet. We thank Dr. Mangala Narlikar for translating the Marathi booklet into English very promptly.

 

1-1-2001

A.P.Deshpande
Hon. Secretary


*******Science through Postcards******


Q.1 Why does the sky look blue?

Electromagnetic Waves - Part - 2

Electromagnetic Waves
Part-2

The presenation explains the basic concepts related to electromagnetic waves. It ends with a set of questionsn (with solution) to make sure that the readers' understand the various concepts explained.




Electromagnetic Waves - Part-1

Electromagnetic Waves
Part - 1

The presenation explains the basic concepts related to electromagnetic waves. It ends with a set of questionsn (with solution) to make sure that the readers' understand the various concepts explained.




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