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Q: Due to… the star appears twinkling in the sky.
  • A. Diffraction of light by the atmosphere
  • B. Reflection of light by atmosphere
  • C. Scattering of light by the atmosphere
  • D. Refraction of light by the atmosphere
Correct Answer: Option D - Due to refraction of light by the atmosphere the star appears twinkling in the sky.
D. Due to refraction of light by the atmosphere the star appears twinkling in the sky.

Explanations:

Due to refraction of light by the atmosphere the star appears twinkling in the sky.