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Galaxy Clusters and Indian Astronomers: A Challenge for Astronomy Experts

This quiz is designed to challenge astronomy experts on the topic of galaxy clusters and the contributions of Indian astronomers to this field. The questions cover various aspects of galaxy clusters, their properties, and the research conducted by Indian astronomers.

15 Questions Published
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Questions

Question 1 Multiple Choice (Single Answer)

What is the largest known galaxy cluster in the universe?

  1. Abell 2218
  2. Coma Cluster
  3. Virgo Cluster
  4. Hercules Cluster
Question 2 Multiple Choice (Single Answer)

Which Indian astronomer is known for his work on the dynamics of galaxy clusters?

  1. Subrahmanyan Chandrasekhar
  2. Jayant Narlikar
  3. Govind Swarup
  4. Harish-Chandra
Question 3 Multiple Choice (Single Answer)

What is the characteristic temperature of a galaxy cluster?

  1. 10^4 K
  2. 10^6 K
  3. 10^8 K
  4. 10^10 K
Question 4 Multiple Choice (Single Answer)

Which Indian astronomer is known for his work on the X-ray emission from galaxy clusters?

  1. Vikram Sarabhai
  2. Homi J. Bhabha
  3. U. R. Rao
  4. M. N. Vahia
Question 5 Multiple Choice (Single Answer)

What is the primary source of energy in a galaxy cluster?

  1. Nuclear fusion
  2. Gravitational potential energy
  3. Dark matter annihilation
  4. Supernovae
Question 6 Multiple Choice (Single Answer)

Which Indian astronomer is known for his work on the formation and evolution of galaxy clusters?

  1. T. Padmanabhan
  2. Biman B. Nath
  3. Ram Gopal Varma
  4. R. K. Kaul
Question 7 Multiple Choice (Single Answer)

What is the typical mass of a galaxy cluster?

  1. 10^12 Msun
  2. 10^14 Msun
  3. 10^16 Msun
  4. 10^18 Msun
Question 8 Multiple Choice (Single Answer)

Which Indian astronomer is known for his work on the dark matter content of galaxy clusters?

  1. P. K. Iyengar
  2. S. K. Gupta
  3. R. Cowsik
  4. V. K. Kapahi
Question 9 Multiple Choice (Single Answer)

What is the role of dark matter in galaxy clusters?

  1. It provides the gravitational potential energy
  2. It dominates the mass of the cluster
  3. It regulates the star formation rate
  4. It controls the X-ray emission
Question 10 Multiple Choice (Single Answer)

Which Indian astronomer is known for his work on the Sunyaev-Zel'dovich effect in galaxy clusters?

  1. J. V. Narlikar
  2. A. K. Kembhavi
  3. R. Nityananda
  4. P. J. Shastri
Question 11 Multiple Choice (Single Answer)

What is the Sunyaev-Zel'dovich effect?

  1. The distortion of the cosmic microwave background radiation by galaxy clusters
  2. The gravitational lensing of light by galaxy clusters
  3. The X-ray emission from galaxy clusters
  4. The radio emission from galaxy clusters
Question 12 Multiple Choice (Single Answer)

Which Indian astronomer is known for his work on the radio emission from galaxy clusters?

  1. Govind Swarup
  2. K. S. Dwarakanath
  3. V. R. Venugopal
  4. Y. W. Gupta
Question 13 Multiple Choice (Single Answer)

What is the role of radio emission in the study of galaxy clusters?

  1. It provides information about the magnetic fields in the cluster
  2. It can be used to detect the presence of active galactic nuclei
  3. It can be used to estimate the mass of the cluster
  4. It can be used to study the dynamics of the cluster
Question 14 Multiple Choice (Single Answer)

Which Indian astronomer is known for his work on the gravitational lensing of light by galaxy clusters?

  1. Biman B. Nath
  2. Jayant Narlikar
  3. T. Padmanabhan
  4. R. Cowsik
Question 15 Multiple Choice (Single Answer)

What is the role of gravitational lensing in the study of galaxy clusters?

  1. It can be used to magnify distant galaxies
  2. It can be used to study the mass distribution in the cluster
  3. It can be used to detect the presence of dark matter
  4. It can be used to study the evolution of the cluster
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