The phenomenon responsible for the formation of a rainbow is
Areflection and interference of light
Bdiffraction and polarisation of light
Cdispersion and total internal reflection of lightCORRECT
Drefraction and diffraction of light
GCEPhysicsLight and Optics2023
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A rainbow is formed when sunlight enters raindrops, is refracted (causing dispersion into its component colours), undergoes total internal reflection at the back of the raindrop, and is then refracted again as it exits. Dispersion separates the colours while total internal reflection directs the light back toward the observer.
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