Which of the following is/are cited by the scientists as evidence/evidences for the continued expansion of universe?

  1. Detection of microwaves in space
  2. Observation of redshirt phenomenon in space
  3. Movement of asteroids in space
  4. Occurrence of supernova explosions in space code

[UPSC Civil Services Exam – 2012 Prelims]

(a) 1 and 2 only

(b) 2 only

(c) 1, 3 and 4

(d) None of the above


Answer: (a)        

Explanation:

Evidence for the continued expansion of the universe:

  • ​​Cosmic microwave background (CMD) – As CMB is the radiation left over from an early stage in the development of the Universe, its discovery is considered a landmark test for the Big Bang model of the Universe. Hence, statement 1 is correct.​​
  • ​Doppler-shift or Redshift and Blueshift – American astronomer Edwin Hubble was the first to describe the redshift phenomenon (galactic redshift) and tie it to an expanding universe (galaxies are drifting apart). Hence, statement 2 is correct.

Consider the following statements:                                                                   The Parliament of India can place a particular law in the Ninth Schedule of the Constitution of India. The validity of a law placed in the Ninth Schedule cannot be examined by any court and no judgement can be made on it. Which of the statements given above is/are correct?

Consider the following statements:                                               

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Consider the following statements:                                                         The Parliament of India can place a particular law in the Ninth Schedule of the Constitution of India. The validity of a law placed in the Ninth Schedule cannot be examined by any court and no judgement can be made on it. Which of the statements given above is/are correct?

Consider the following statements:                                               

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