The correct answer is (b), M.N. Saha.
M.N. Saha was an Indian astrophysicist and physicist who made significant contributions to the development of the theory of thermal ionization. He is best known for his Saha ionization equation, which is used to calculate the equilibrium between ionized and unionized atoms in a gas.
Saha was born in 1893 in Kolkata, India. He studied at the University of Calcutta, where he received his bachelor’s degree in 1916 and his master’s degree in 1918. He then went on to study at the University of Cambridge, where he received his Ph.D. in 1923.
After completing his education, Saha returned to India and joined the Indian Statistical Institute in Kolkata. He also served as a professor of physics at the University of Calcutta.
Saha’s research focused on the physics of gases and plasmas. He made significant contributions to the development of the theory of thermal ionization, which is the process by which atoms or molecules lose electrons when they are heated. Saha’s work on thermal ionization was used to explain the behavior of stars and other astronomical objects.
Saha was also a pioneer in the field of astrophysics. He made significant contributions to the study of the Sun and other stars. He also developed a theory of the formation of galaxies.
Saha was a highly respected scientist and academic. He was elected a Fellow of the Royal Society in 1932. He also received numerous awards, including the Padma Bhushan, India’s third-highest civilian award.
Saha died in 1956 at the age of 62. He is remembered as one of India’s most important scientists.
The other options are incorrect because:
- H.J. Bhabha was an Indian nuclear physicist who made significant contributions to the development of nuclear energy in India.
- C.V. Raman was an Indian physicist who won the Nobel Prize in Physics in 1930 for his discovery of the Raman effect.
- J.C. Bose was an Indian physicist who made significant contributions to the study of electromagnetism and plant physiology.