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  9. Q638

RRB Junior Engineer / DMS / CMA 2024 · Question 638 of 730

Why do stars appear to twinkle when viewed from the Earth?

  1. ARefraction in the Earth’s atmosphereCorrect
  2. BDiffraction by clouds
  3. CReflection in the atmosphere
  4. DScattering by particles

Answer: A. Refraction in the Earth’s atmosphere

Official answer key verified. Detailed explanation coming soon.

Source: Railway Junior Engineer 2024 Answer Key compilation (English) — testranking.in (Gagan Pratap) · reliable-secondary

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