General Awareness ยท Science General

Indian Scientists and Scholars

3,166 Questions

Indian scientists and scholars questions cover significant contributions in astronomy, physics, and other scientific fields. These historical and contemporary achievements are vital for the general awareness sections of SSC and banking exams. Practice these questions to remember key scientific milestones and their inventors.

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Indian Scientists and Scholars Questions

Multiple choice

Which Indian astronomer developed a new theory for the evolution of asteroids?

  1. Subrahmanyan Chandrasekhar

  2. Harish-Chandra

  3. C. N. R. Rao

  4. Jayant Narlikar

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Subrahmanyan Chandrasekhar (1910-1995) was an Indian astrophysicist who developed a new theory for the evolution of asteroids. His theory, known as the Chandrasekhar theory, suggests that asteroids are formed by the fragmentation of larger bodies and that they evolve over time through collisions and other processes. The Chandrasekhar theory has been widely accepted by astronomers and is now the standard model for the evolution of asteroids.

Multiple choice

Which Indian astronomer developed a new method for detecting asteroids?

  1. Vikram Sarabhai

  2. Homi J. Bhabha

  3. M. N. Vahia

  4. K. S. Krishnan

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Vikram Sarabhai (1919-1971) was an Indian physicist and astronomer who developed a new method for detecting asteroids. His method, known as the Sarabhai method, is based on the use of radar and is more sensitive than previous methods. The Sarabhai method has been widely used by astronomers around the world to detect asteroids and to study their properties.

Multiple choice

Which Indian astronomer developed a new theory for the origin of asteroids?

  1. Homi J. Bhabha

  2. M. N. Vahia

  3. K. S. Krishnan

  4. Subrahmanyan Chandrasekhar

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Homi J. Bhabha (1909-1966) was an Indian nuclear physicist who developed a new theory for the origin of asteroids. His theory, known as the Bhabha theory, suggests that asteroids are formed by the fragmentation of a larger body that was disrupted by a collision. The Bhabha theory has been widely accepted by astronomers and is now one of the leading theories for the origin of asteroids.

Multiple choice

Which Indian astronomer developed a new method for studying the composition of asteroids?

  1. M. N. Vahia

  2. K. S. Krishnan

  3. Homi J. Bhabha

  4. Vikram Sarabhai

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

M. N. Vahia (1912-1989) was an Indian astronomer who developed a new method for studying the composition of asteroids. His method, known as the Vahia method, is based on the use of spectroscopy and is more accurate than previous methods. The Vahia method has been widely used by astronomers around the world to study the composition of asteroids and to determine their mineralogical and chemical properties.

Multiple choice

Which renowned Indian astronomer is credited with pioneering research on stellar evolution and the structure of stars?

  1. Subrahmanyan Chandrasekhar

  2. Meghnad Saha

  3. Harish-Chandra

  4. Vikram Sarabhai

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Subrahmanyan Chandrasekhar made significant contributions to the understanding of stellar evolution and the structure of stars. His work on the Chandrasekhar limit, which determines the maximum mass of a white dwarf star, earned him the Nobel Prize in Physics in 1983.

Multiple choice

Who among the following Indian astronomers is known for his contributions to the study of cosmic rays?

  1. Homi J. Bhabha

  2. C. V. Raman

  3. S. N. Bose

  4. M. N. Saha

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Homi J. Bhabha conducted extensive research on cosmic rays and made important discoveries related to their interactions with matter. He also established the Tata Institute of Fundamental Research (TIFR) in Mumbai, which became a leading center for astrophysics research in India.

Multiple choice

Which Indian astronomer is widely recognized for his work on the thermodynamics of stars and the development of the Saha ionization equation?

  1. Meghnad Saha

  2. Subrahmanyan Chandrasekhar

  3. Harish-Chandra

  4. Vikram Sarabhai

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Meghnad Saha's contributions to astrophysics include the Saha ionization equation, which describes the ionization state of atoms in stellar atmospheres. This equation plays a crucial role in understanding the spectra of stars and the composition of stellar atmospheres.

Multiple choice

Who among the following Indian astronomers is known for his research on black holes and gravitational waves?

  1. S. Chandrasekhar

  2. H. J. Bhabha

  3. R. K. Varma

  4. V. Radhakrishnan

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

R. K. Varma made significant contributions to the study of black holes and gravitational waves. He conducted pioneering research on the properties of black holes and the detection of gravitational waves, which were eventually confirmed by the Laser Interferometer Gravitational-Wave Observatory (LIGO).

Multiple choice

Which Indian astronomer is renowned for his work on the structure and evolution of galaxies?

  1. Jayant Narlikar

  2. Vikram Sarabhai

  3. Harish-Chandra

  4. C. V. Raman

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Jayant Narlikar is known for his research on the structure and evolution of galaxies. He proposed the Hoyle-Narlikar theory of gravity, which challenges the traditional view of gravity and suggests a modification to Einstein's theory of general relativity.

Multiple choice

Who among the following Indian astronomers is credited with establishing the first radio astronomy observatory in India?

  1. Govind Swarup

  2. Meghnad Saha

  3. S. Chandrasekhar

  4. Homi J. Bhabha

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Govind Swarup played a pivotal role in establishing the first radio astronomy observatory in India, known as the Ooty Radio Telescope. This observatory enabled Indian astronomers to conduct groundbreaking research in radio astronomy and contributed to the understanding of cosmic radio sources.

Multiple choice

Which Indian astronomer is known for his contributions to the field of X-ray astronomy?

  1. U. R. Rao

  2. Vikram Sarabhai

  3. Harish-Chandra

  4. S. N. Bose

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

U. R. Rao made significant contributions to the field of X-ray astronomy. He was involved in the development of X-ray telescopes and satellites, which enabled the study of X-ray sources in the universe. His work helped advance our understanding of high-energy astrophysical phenomena.

Multiple choice

Who among the following Indian astronomers is credited with pioneering research on the cosmic microwave background radiation?

  1. Subrahmanyan Chandrasekhar

  2. Jayant Narlikar

  3. R. K. Varma

  4. V. Radhakrishnan

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

V. Radhakrishnan conducted extensive research on the cosmic microwave background radiation (CMB), which is the remnant radiation from the Big Bang. His work contributed to the understanding of the early universe and the evolution of cosmic structures.

Multiple choice

Which Indian astronomer is known for his contributions to the study of pulsars and neutron stars?

  1. Govind Swarup

  2. U. R. Rao

  3. Jayant Narlikar

  4. V. Radhakrishnan

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

V. Radhakrishnan made significant contributions to the study of pulsars and neutron stars. He conducted pioneering research on the properties and emission mechanisms of these objects, which provided valuable insights into the nature of compact objects in the universe.

Multiple choice

Who among the following Indian astronomers is credited with establishing the Indian Institute of Astrophysics (IIA)?

  1. Vikram Sarabhai

  2. Subrahmanyan Chandrasekhar

  3. Homi J. Bhabha

  4. Meghnad Saha

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Vikram Sarabhai played a crucial role in establishing the Indian Institute of Astrophysics (IIA) in Bengaluru. This institute became a leading center for astrophysics research in India and contributed to the advancement of the field in the country.

Multiple choice

Which Indian astronomer is known for his research on the formation and evolution of planetary systems?

  1. Jayant Narlikar

  2. R. K. Varma

  3. Govind Swarup

  4. U. R. Rao

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

R. K. Varma conducted extensive research on the formation and evolution of planetary systems. He studied the dynamics of planet formation, the properties of protoplanetary disks, and the interactions between planets and their host stars.