The phenomenon of rainbow formation by water droplets involves:

  1. A. single refraction of sunlight.
  2. B. one internal reflection of sunlight.
  3. C. two internal reflections of sunlight.
  4. D. both refraction and internal reflection of sunlight.

Correct Answer: D. both refraction and internal reflection of sunlight.

Explanation

A rainbow is formed by a combination of dispersion, refraction, and internal reflection of sunlight within water droplets[cite: 1].

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