Physics

What is the contribution of S. Chandra sekhar to physics?


SOLUTION

S. Chandrasekhar was an Indian-born American astrophysicist who, with William A. Fowler, won the 1983 Nobel Prize for Physics for key discoveries that led to the currently accepted theory on the later evolutionary stages of massive stars.

By the early 1930s, scientists had concluded that after converting all of their hydrogens to helium stars lose energy and contract under the influence of their own gravity. These stars, known as white dwarf stars, contract to about the size of Earth, and the electrons and nuclei of their constituent atoms are compressed to a state of extremely high density. Chandrasekhar determined what is known as the Chandrasekhar limit—that a star having a mass more than 1.44 times that of the Sun does not form a white dwarf but instead continues to collapse, blows off its gaseous envelope in a supernova explosion, and becomes a neutron star. An even more massive star continues to collapse and becomes a black hole. These calculations contributed to the eventual understanding of supernovas, neutron stars, and black holes.

He did important work on energy transfer by radiation in stellar atmospheres and convention on the solar surface. He also attempted to develop the mathematical theory of black holes, describing his work in The Mathematical Theory of Black Holes (1983).

His other books include An Introduction to the Study of Stellar Structure (1939), Principles of Stellar Dynamics (1942), Radiative Transfer (1950), Hydrodynamic and Hydromagnetic Stability (1961), Truth and Beauty: Aesthetics and Motivations in Science (1987), and Newton’s Principia for the Common Reader(1995).
View Answers

You're just one step away

Create your Digital Resume For FREE on your name's sub domain "yourname.wcard.io". Register Here!


Subjective Hard Published on 18th 08, 2020
Next Question
Questions 244531
Subjects 8
Chapters 125
Enrolled Students 201
Enroll Now For FREE

Realted Questions

Q1 Subjective Medium
Which scientist was also a member of Parliament ? 

Asked in: Physics - Physical World


1 Verified Answer | Published on 18th 08, 2020

View Answer
Q2 Single Correct Medium
What was the biggest change in fundamental $$1$$, studies of systematic is:
  • A. Recognition of sharing of resources.
  • B. Recognition of sharing of similarity.
  • C. Recognition of sharing of physical law.
  • D. Recognition of sharing of celestial body.

Asked in: Physics - Physical World


1 Verified Answer | Published on 18th 08, 2020

View Answer
Q3 Single Correct Medium
Who was the first pre-Socratic philosopher to suggest that matter could neither be created nor destroyed?
  • A. kepler
  • B. Newton
  • C. parmenides
  • D. None of these

Asked in: Physics - Physical World


1 Verified Answer | Published on 18th 08, 2020

View Answer
Q4 Single Correct Medium
In the given figure $$Y$$, magnet $$P$$ is experiencing ____
(1) Magnetic force of repulsion  (2) Magnetic force of attraction
(3) Elastic spring force (4) Gravity
  • A. 1 and 3 only
  • B. 1 and 4 only
  • C. 2 and 3 only
  • D. 2 and 4 only

Asked in: Physics - Physical World


1 Verified Answer | Published on 18th 08, 2020

View Answer
Q5 Single Correct Medium
Heliocentric theory was proposed by ................
  • A. Copernicus
  • B. Ptolemy
  • C. Newton
  • D. Tychobrahe

Asked in: Physics - Physical World


1 Verified Answer | Published on 18th 08, 2020

View Answer