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  9. Q391

RRB Group D (Level-1 posts) 2022 · Question 391 of 598

The apparent position of a star keeps on changing slightly because:

  1. Athe physical conditions of the atmosphere are stationary
  2. Bthe atmosphere scatters star light
  3. Cthe atmosphere consists of a mixture of gases
  4. Dthe physical conditions of the atmosphere keep changingCorrect

Answer: D. the physical conditions of the atmosphere keep changing

Explanation

The apparent position of stars changes due to atmospheric refraction, which is caused by changes in atmospheric conditions, making option 4 correct.

Source: RRB Group D 2022 Prev. Yr. Paper (18 Aug 2022) (Shift 2) - Prepp · reliable-secondary

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