alleryA rainbow in the sky after a rain shower is formed by:
ARefraction + dispersion + reflection inside raindrops
BPure reflection of moonlight from the sky
CScattering of moonlight by atmospheric dust
DTyndall effect from atmospheric water vapour
Answer & Solution
Correct answer: A. Refraction + dispersion + reflection inside raindrops
A rainbow forms when sunlight enters each raindrop, refracts + disperses into colours, reflects off the back of the drop, refracts again on exit.
The result is a 42° arc with red outside and violet inside.
Requires sunlight behind viewer + rain in front.
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