Subscribe for Newsletters and Discounts
Be the first to receive our thoughtfully written
religious articles and product discounts.
Your interests (Optional)
This will help us make recommendations and send discounts and sale information at times.
By registering, you may receive account related information, our email newsletters and product updates, no more than twice a month. Please read our Privacy Policy for details.
.
By subscribing, you will receive our email newsletters and product updates, no more than twice a month. All emails will be sent by Exotic India using the email address info@exoticindia.com.

Please read our Privacy Policy for details.
|6
Your Cart (0)
Share our website with your friends.
Email this page to a friend
Books > History > M N Saha in Historical Perspective
Displaying 40 of 4978         Previous  |  NextSubscribe to our newsletter and discounts
M N Saha in Historical Perspective
Pages from the book
M N Saha in Historical Perspective
Look Inside the Book
Description
About the Book

This unusual collection of readings on the life and work of Meghnad Saha (1893-1956), the outstanding Indian astrophysicist best known for his seminal theories of thermal ionization and selective radiation pressure, brings together a selection of memorial pieces, rarely accessible early responses to his work by major contemporaries like Jeans, Erdington, Russell, Mitchell, and Harlow Shapley, a more recent scholarly documentation of his work and its repercussions, and evaluations by younger Indian Scientists. They add up to offer an image of Saha as man, scientist and politician-and humanist-against the setting of the complex historic experience of colonial India moving towards independence and development. Saha’s role in the process comes in for critical assessment, as the rich global implications mingle with the more immediately national. Aimed at both the specialist reader and the more general one, the book should serve as a fairly comprehensive account of the achievements of Saha, and what they mean to science today.

Jyotirmoy Gupta, veteran journalist and science correspondent, has recently edited (jointly with Santimay Chatterjee) M.N. Saha in Parliament for the Asiatic Society, Calcutta.

Introduction

The recent surge of popular interest in the fundamental sciences, particularly in fundamental physics, has been one of the more unusual and significant developments of our time. People have been wondering as to why physics, with its abstruse, almost impenetrable formulae and esoteric technical jargon, should suddenly draw such attention in the western world. Several scholars in the West would credit it to the immense power of physics to explain aspects of the mysterious universe considered inexplicable for too long. Among the natural sciences, physics alone can claim to be an all-encompassing discipline, with the whole universe for its subject. It is only through physics, or rather 'the new physics' that all aspects of the cosmos, ranging from the elementary particles within the atoms to the largest astronomical structures, can be perceived within a single conceptual framework.

In other words, modern physics has disclosed the existence of a whole new world of which man had no inkling before - the. world of quanta, elementary and 'strange particles', electronic clouds, atomic nuclei, electromagnetic waves, and the relativity laws of superhuman speeds and dimensions - that has emerged as the real world, and the world we knew earlier is now but a flickering shadow.

One wonders if the popular interest in fundamental physics is already a sign at last of a trend that should eventually bridge the gulf between the two polar groups- the scientists and the humanists. The global trend has affected India too, where there has been a steady growth in science publishing in the Indian languages, and media exposure of scientific ideas and information at several levels.

The schism in the intellectual community between scientists and humanists has been a subject of serious concern in this century. The man who first underscored the polarization of these two groups of enlightened human beings, and read it as the phenomenon of the 'Two Cultures' in his Rede Lecture at Cambridge in 1959 was Charles Percy Snow, better known to his readers as C P Snow, the British novelist and physicist. But the divide and tension can be traced back to the ancient Egyptians and Greeks. The conflict has been steadily heated for the past four or five centuries, with Copernicus, Galileo, Kepler and Newton and their successors serving to fire it up. Science historian I Bernard Cohen pointed out that authors in the eras dominated by the stalwarts 'apparently made science understandable to the reading public.' In this connection, he could cite the instances of authors like Fontanelle, Voltaire, Euler, and others. 'These writers were perhaps successful because then only well-educated people could read them and moreover science was not complex.'

But the 'cultural divide' became wider in the last century as a consequence of the theories of Charles Darwin and Thomas Huxley and the later discoveries in the new physics of quantum mechanics and relativity. From the Victorian days onwards, Henry Adams, Alfred Whitehead, George Sarton, James Jeans, AS Eddington, C P Snow and several other thinkers have almost interminably warned their readers against the dangers of a fractured culture. Before C P Snow in the 1959 Rede Lecture referred pointedly to the serious danger inherent in the widening gap between the two cultures, George Sarton, the celebrated science historian, had also made the same point in 1930. 'The most ominous conflict of our time,' Sarton observed, 'is the difference of opinion, or outlook, between men of letters, historians, philosophers, the so-called humanists on the one side and scientists on the other.' Whatever both Sarton and Snow said in this regard, they said from their personal experiences and no one could deny the strength of their evidence. This relationship of conflict between the two cultures is, according to both of them, 'fatal to both science and society.' C P Snow felt further that with their preoccupation with the study of the mystery of the universe and their endeavour to control the forces of nature, the scientists are likely to take a more rational view-of men and things. Although Snow maintained that there were two cultures that had drifted apart, his several critics felt that there was a much closer affinity between the arts and science than he claimed. 'It might not be long before only a single culture remains; or that there is a third culture- man in society.'

The gulf ominously widening between the scientists and humanists in India shows signs of healing with the growing public interest in the fundamental sciences. There is little scope here to document in detail the growth of such interest in India.

Against this background, it is certainly worthwhile to project in a proper perspective the scientific contributions of Meghnad Saha, on the occasion of his birth centenary this year, for the benefit of readers at home anti abroad. Saha's scientific contributions, particularly in astrophysics, led to a new era in astronomy, and he has been de- scribed as the father of modern astrophysics.

The first astrophysical work of any importance in India is credited to the French astronomer, Jansen, who in 1868, observed a total solar eclipse of the sun passing over Guntur (now in Andhra Pradesh) and applied the spectroscope to the Sun during the moments of totality; and found a line close to and on the violet side of the yellow line of sodium. This line was also observed independently by Norman Lockyer who christened it 'helium'. It is now a matter of common knowledge that helium was discovered thirty years later (1898) by Ramsay in the Norwegian' mineral Clevite (cf. The Progress of Science in India during the past Twenty-Five Years, published by the Indian Science Congress Association in 1938).

The total solar eclipse of 1868 which passed over Buxer and what was then the Western Presidency was observed by Lockyer, Evershed and Naegamvela. Photographs of the flash spectra were obtained by all the three observers. Evershed, who succeeded to the Directorship of the Kodai- kanal Laboratory in 1911, instituted a programme for the photography of prominences and systematic investigation of the spectra of sunspots and their penumbra. These observations led to his discovery of radial motion in sun- spots; and simultaneously with Alfred Fowler, G E Hale, SA Mitchell and W S Adams, he drew the inference that the spectra of spots were similar to those of the k-class of stars. C Nagaraja Aiyar in 1907 at Kodaikanal obtained a. reversal of the D-Iine of helium in the penumbra of spots. Evershed proved that all spark lines are weakened in the spot, a fact which was later explained with the help of Meghnad Saha's theory of thermal ionization formulated in the 1920s. The tradition so happily created by Evershed at Kodaikanal was continued by his successors, T Royds and A L Narayan.

Saha appeared on the Indian science scene In 1917 with his first paper - 'On Maxwell's Stresses' (Phil. Mag. Sr. VI, 3,256,1917). This was the first paper from India in modern theoretical physics in this century. But his researches in astrophysics date from 1919; and within a span of two years his works would lead to a new era in modern astrophysics. The stimulus for his researches in astrophysics came from a study of Miss Agnes Clerke's popular books on astronomy.

CONTENTS

  Introduction 1
1 Meghnad Saha : a Profile 19
2 Meghnad Saha : A Biographical Resume 29
3 Reminiscences of the School and College Days with professor M N Saha 47
4 Professor Meghnad Saha - An Appreciation 52
5 Astrophysics 54
6 M N Saha : Spectra and Temperature 56
7 An Early Response 61
8 The Importance of Ionization 68
9 The Sun's Turbulent Surface 87
10 Quantum Physics and the Stars I 96
11 Quantum Physics and the Stars II 140
12 A Stratospheric Observatory 177
13 Quantative Astronomical Spectroscopy in the post-Saha-Equation period 184
14 Professor Meghnad Saha - A Scientific Phenomenon on the Indian Scene 195
15 Meghnad Saha : His journey to the physics of the Stars 206
16 The Saha Equation-Seventy Years Later and Fifteen Billion Years Ago 224
17 M N Saha : From the Next Generation 227

 












M N Saha in Historical Perspective

Item Code:
NAN229
Cover:
Hardcover
Edition:
1994
ISBN:
8186017062
Language:
English
Size:
9.0 inch X 6.0 inch
Pages:
245 (10 B/W Illustrations)
Other Details:
Weight of the Book: 440 gms
Price:
$30.00
Discounted:
$22.50   Shipping Free
You Save:
$7.50 (25%)
Look Inside the Book
Add to Wishlist
Send as e-card
Send as free online greeting card
M N Saha in Historical Perspective

Verify the characters on the left

From:
Edit     
You will be informed as and when your card is viewed. Please note that your card will be active in the system for 30 days.

Viewed 240 times since 22nd Sep, 2017
About the Book

This unusual collection of readings on the life and work of Meghnad Saha (1893-1956), the outstanding Indian astrophysicist best known for his seminal theories of thermal ionization and selective radiation pressure, brings together a selection of memorial pieces, rarely accessible early responses to his work by major contemporaries like Jeans, Erdington, Russell, Mitchell, and Harlow Shapley, a more recent scholarly documentation of his work and its repercussions, and evaluations by younger Indian Scientists. They add up to offer an image of Saha as man, scientist and politician-and humanist-against the setting of the complex historic experience of colonial India moving towards independence and development. Saha’s role in the process comes in for critical assessment, as the rich global implications mingle with the more immediately national. Aimed at both the specialist reader and the more general one, the book should serve as a fairly comprehensive account of the achievements of Saha, and what they mean to science today.

Jyotirmoy Gupta, veteran journalist and science correspondent, has recently edited (jointly with Santimay Chatterjee) M.N. Saha in Parliament for the Asiatic Society, Calcutta.

Introduction

The recent surge of popular interest in the fundamental sciences, particularly in fundamental physics, has been one of the more unusual and significant developments of our time. People have been wondering as to why physics, with its abstruse, almost impenetrable formulae and esoteric technical jargon, should suddenly draw such attention in the western world. Several scholars in the West would credit it to the immense power of physics to explain aspects of the mysterious universe considered inexplicable for too long. Among the natural sciences, physics alone can claim to be an all-encompassing discipline, with the whole universe for its subject. It is only through physics, or rather 'the new physics' that all aspects of the cosmos, ranging from the elementary particles within the atoms to the largest astronomical structures, can be perceived within a single conceptual framework.

In other words, modern physics has disclosed the existence of a whole new world of which man had no inkling before - the. world of quanta, elementary and 'strange particles', electronic clouds, atomic nuclei, electromagnetic waves, and the relativity laws of superhuman speeds and dimensions - that has emerged as the real world, and the world we knew earlier is now but a flickering shadow.

One wonders if the popular interest in fundamental physics is already a sign at last of a trend that should eventually bridge the gulf between the two polar groups- the scientists and the humanists. The global trend has affected India too, where there has been a steady growth in science publishing in the Indian languages, and media exposure of scientific ideas and information at several levels.

The schism in the intellectual community between scientists and humanists has been a subject of serious concern in this century. The man who first underscored the polarization of these two groups of enlightened human beings, and read it as the phenomenon of the 'Two Cultures' in his Rede Lecture at Cambridge in 1959 was Charles Percy Snow, better known to his readers as C P Snow, the British novelist and physicist. But the divide and tension can be traced back to the ancient Egyptians and Greeks. The conflict has been steadily heated for the past four or five centuries, with Copernicus, Galileo, Kepler and Newton and their successors serving to fire it up. Science historian I Bernard Cohen pointed out that authors in the eras dominated by the stalwarts 'apparently made science understandable to the reading public.' In this connection, he could cite the instances of authors like Fontanelle, Voltaire, Euler, and others. 'These writers were perhaps successful because then only well-educated people could read them and moreover science was not complex.'

But the 'cultural divide' became wider in the last century as a consequence of the theories of Charles Darwin and Thomas Huxley and the later discoveries in the new physics of quantum mechanics and relativity. From the Victorian days onwards, Henry Adams, Alfred Whitehead, George Sarton, James Jeans, AS Eddington, C P Snow and several other thinkers have almost interminably warned their readers against the dangers of a fractured culture. Before C P Snow in the 1959 Rede Lecture referred pointedly to the serious danger inherent in the widening gap between the two cultures, George Sarton, the celebrated science historian, had also made the same point in 1930. 'The most ominous conflict of our time,' Sarton observed, 'is the difference of opinion, or outlook, between men of letters, historians, philosophers, the so-called humanists on the one side and scientists on the other.' Whatever both Sarton and Snow said in this regard, they said from their personal experiences and no one could deny the strength of their evidence. This relationship of conflict between the two cultures is, according to both of them, 'fatal to both science and society.' C P Snow felt further that with their preoccupation with the study of the mystery of the universe and their endeavour to control the forces of nature, the scientists are likely to take a more rational view-of men and things. Although Snow maintained that there were two cultures that had drifted apart, his several critics felt that there was a much closer affinity between the arts and science than he claimed. 'It might not be long before only a single culture remains; or that there is a third culture- man in society.'

The gulf ominously widening between the scientists and humanists in India shows signs of healing with the growing public interest in the fundamental sciences. There is little scope here to document in detail the growth of such interest in India.

Against this background, it is certainly worthwhile to project in a proper perspective the scientific contributions of Meghnad Saha, on the occasion of his birth centenary this year, for the benefit of readers at home anti abroad. Saha's scientific contributions, particularly in astrophysics, led to a new era in astronomy, and he has been de- scribed as the father of modern astrophysics.

The first astrophysical work of any importance in India is credited to the French astronomer, Jansen, who in 1868, observed a total solar eclipse of the sun passing over Guntur (now in Andhra Pradesh) and applied the spectroscope to the Sun during the moments of totality; and found a line close to and on the violet side of the yellow line of sodium. This line was also observed independently by Norman Lockyer who christened it 'helium'. It is now a matter of common knowledge that helium was discovered thirty years later (1898) by Ramsay in the Norwegian' mineral Clevite (cf. The Progress of Science in India during the past Twenty-Five Years, published by the Indian Science Congress Association in 1938).

The total solar eclipse of 1868 which passed over Buxer and what was then the Western Presidency was observed by Lockyer, Evershed and Naegamvela. Photographs of the flash spectra were obtained by all the three observers. Evershed, who succeeded to the Directorship of the Kodai- kanal Laboratory in 1911, instituted a programme for the photography of prominences and systematic investigation of the spectra of sunspots and their penumbra. These observations led to his discovery of radial motion in sun- spots; and simultaneously with Alfred Fowler, G E Hale, SA Mitchell and W S Adams, he drew the inference that the spectra of spots were similar to those of the k-class of stars. C Nagaraja Aiyar in 1907 at Kodaikanal obtained a. reversal of the D-Iine of helium in the penumbra of spots. Evershed proved that all spark lines are weakened in the spot, a fact which was later explained with the help of Meghnad Saha's theory of thermal ionization formulated in the 1920s. The tradition so happily created by Evershed at Kodaikanal was continued by his successors, T Royds and A L Narayan.

Saha appeared on the Indian science scene In 1917 with his first paper - 'On Maxwell's Stresses' (Phil. Mag. Sr. VI, 3,256,1917). This was the first paper from India in modern theoretical physics in this century. But his researches in astrophysics date from 1919; and within a span of two years his works would lead to a new era in modern astrophysics. The stimulus for his researches in astrophysics came from a study of Miss Agnes Clerke's popular books on astronomy.

CONTENTS

  Introduction 1
1 Meghnad Saha : a Profile 19
2 Meghnad Saha : A Biographical Resume 29
3 Reminiscences of the School and College Days with professor M N Saha 47
4 Professor Meghnad Saha - An Appreciation 52
5 Astrophysics 54
6 M N Saha : Spectra and Temperature 56
7 An Early Response 61
8 The Importance of Ionization 68
9 The Sun's Turbulent Surface 87
10 Quantum Physics and the Stars I 96
11 Quantum Physics and the Stars II 140
12 A Stratospheric Observatory 177
13 Quantative Astronomical Spectroscopy in the post-Saha-Equation period 184
14 Professor Meghnad Saha - A Scientific Phenomenon on the Indian Scene 195
15 Meghnad Saha : His journey to the physics of the Stars 206
16 The Saha Equation-Seventy Years Later and Fifteen Billion Years Ago 224
17 M N Saha : From the Next Generation 227

 












Post a Comment
 
Post Review
Post a Query
For privacy concerns, please view our Privacy Policy

Based on your browsing history

Loading... Please wait

Related Items

Caste System in India (A Historical Perspective)
by Ekta Singh
Hardcover (Edition: 2016)
Kalpaz Publications
Item Code: NAM091
$38.00$28.50
You save: $9.50 (25%)
Add to Cart
Buy Now
Science In India (A Historical Perspective)
by B.V. Subbarayappa
Hardcover (Edition: 2013)
Rupa Publication Pvt. Ltd.
Item Code: NAJ097
$65.00$48.75
You save: $16.25 (25%)
Add to Cart
Buy Now
Historical Perspectives of Warfare in India: Some Morale and Materiel Determinants
Deal 20% Off
Item Code: IDI113
$85.00$51.00
You save: $34.00 (20 + 25%)
Add to Cart
Buy Now
Tamil Siddhas (A Study from Historical, Socio-Cultural and Religio-Philosophical Perspectives)
Item Code: IDJ971
$35.00$26.25
You save: $8.75 (25%)
Add to Cart
Buy Now
Histrocity of Rama and Krsna: Literary, Historical, Archaelogical and Scientific Perspectives
by G. P. Singh
Paperback (Edition: 2008)
D.K Printworld (P) Ltd
Item Code: NAE203
$10.00$7.50
You save: $2.50 (25%)
Add to Cart
Buy Now
Perspectives on Indian History, Historiography and Philosophy of History
by G. P. Singh
Hardcover (Edition: 2009)
D. K. Printworld Pvt. Ltd.
Item Code: NAD219
$30.00$22.50
You save: $7.50 (25%)
Add to Cart
Buy Now
India's Religions: Perspectives from Sociology and History
by T. N. Madan
Hardcover (Edition: 2004)
Oxford University Press
Item Code: IDF781
$39.50$29.62
You save: $9.88 (25%)
Add to Cart
Buy Now
Indian Art History Changing Perspectives
by Parul Pandy Dhar
Hardcover (Edition: 2011)
D. K. Printworld Pvt. Ltd.
Item Code: NAE351
$45.00$33.75
You save: $11.25 (25%)
Add to Cart
Buy Now
Negotiating Religion (Perspectives from Indian History)
Item Code: NAM742
$45.00$33.75
You save: $11.25 (25%)
Add to Cart
Buy Now
Puranas and Acculturation (A Historico - Anthropological Perspective)
Item Code: NAK128
$30.00$22.50
You save: $7.50 (25%)
Add to Cart
Buy Now
Biography as History: Indian Perspectives
Item Code: IHL260
$35.00$26.25
You save: $8.75 (25%)
SOLD
Human Development in Indian Perspective
by Kapila Vatsyayan
Hardcover (Edition: 2018)
D. K. Printworld Pvt. Ltd.
Item Code: NAN745
$40.00$30.00
You save: $10.00 (25%)
Add to Cart
Buy Now
The People's War in Nepal (Left Perspectives)
Item Code: NAM659
$35.00$26.25
You save: $8.75 (25%)
Add to Cart
Buy Now

Testimonials

I love your site and although today is my first order, I have been seeing your site for the past several years. Thank you for providing such great art and books to people around the World who can't make it to India as often as we would like.
Rupesh
Heramba Ganapati arrived safely today and was shipped promptly. Another fantastic find from Exotic India with perfect customer service. Thank you. Jai Ganesha Deva
Marc, UK
I ordered Padmapani Statue. I have received my statue. The delivering process was very fast and the statue looks so beautiful. Thank you exoticindia, Mr. Vipin (customer care). I am very satisfied.
Hartono, Indonesia
Very easy to buy, great site! Thanks
Ilda, Brazil
Our Nandi sculpture arrived today and it surpasses all expectations - it is wonderful. We are not only pleasantly surprised by the speed of international delivery but also are extremely grateful for the care of your packaging. Our sculpture needed to travel to an off-lying island of New Zealand but it arrived safely because of how well it had been packaged. Based upon my experience of all aspects of your service, I have no hesitation in recommending Exotic India.
BWM, NZ
Best web site to shop on line.
Suman, USA
Thank you for having such a great website. I have given your site to all the people I get compliments on your merchandise.
Pat, Canada.
Love the website and the breadth of selection. Thanks for assembling such a great collection of art and sculpture.
Richard, USA
Another three books arrived during the last weeks, all of them diligently packed. Excellent reading for the the quieter days at the end of the year. Greetings to Vipin K. and his team.
Walter
Your products are uncommon yet have advanced my knowledge and devotion to Sanatana Dharma. Also, they are reasonably priced and ship quickly. Thank you for all you do.
Gregory, USA
TRUSTe
Language:
Currency:
All rights reserved. Copyright 2017 © Exotic India