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Q: Planets do not twinkle because:
  • A. they scatter more light
  • B. they scatter less light
  • C. they act as extended source of light
  • D. they act as a point source of light
Correct Answer: Option C - The planets of our Solar System are much closer in comparison to the stars from the earth and thus planets acts as extended sources of light. The fluctuations in the light coming from the various points of planet due to refraction in atmosphere get averaged out and this is the reason for no twinkling of planets.
C. The planets of our Solar System are much closer in comparison to the stars from the earth and thus planets acts as extended sources of light. The fluctuations in the light coming from the various points of planet due to refraction in atmosphere get averaged out and this is the reason for no twinkling of planets.

Explanations:

The planets of our Solar System are much closer in comparison to the stars from the earth and thus planets acts as extended sources of light. The fluctuations in the light coming from the various points of planet due to refraction in atmosphere get averaged out and this is the reason for no twinkling of planets.