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Q: Which of the following optical phenomena can explain the visibility of the sun, two minutes prior to actual sunrise?
  • A. Scattering of light
  • B. Atmospheric refraction
  • C. Total Internal reflection
  • D. Dispersion of light
Correct Answer: Option B - Refraction of light is the atmospheric phenomenon due to which the sun can be seen above the horizon about two minutes before actual sunrise.
B. Refraction of light is the atmospheric phenomenon due to which the sun can be seen above the horizon about two minutes before actual sunrise.

Explanations:

Refraction of light is the atmospheric phenomenon due to which the sun can be seen above the horizon about two minutes before actual sunrise.