Q. Consider the following statements:
1.AstroSat is India’s first dedicated multi-wavelength astronomy mission that observes the universe in X-ray, optical, and UV bands simultaneously.
2.The Thirty Meter Telescope (TMT) is a radio telescope project being built in Hawaii to detect faint signals from the early universe.
3.The SARAS telescope is an Indian radio telescope designed to detect signals from the “Cosmic Dawn” (the birth of the first stars).
Which of the statements given above are correct?

[A] 1 and 2 only

[B] 2 and 3 only

[C] 1 and 3 only

[D] 1, 2 and 3

Answer: C
Notes:

Explanation:

  • Statement 1 is correct: AstroSat’s unique feature is its ability to observe different wavelengths at the same time.
  • Statement 2 is incorrect: TMT is an Optical/Infrared telescope (using mirrors), not a radio telescope.
  • Statement 3 is correct: SARAS (Shaped Antenna measurement of the background Radio Spectrum) is used to study the Epoch of Reionization.
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