Question

Which different phenomena are involved in formation of rainbow

Answer 1

Dispersion of light.
Sunlight acts like a source of white light and drops of water like a glass prism.
hope it helps.

Answer 2

$\huge\bold\color{aqua}{Answer}$

A rainbow is a meteorological phenomenon that is caused by reflection, refraction and dispersion of light in water droplets resulting in a spectrum of light appearing in the sky. It takes the form of a multicoloured circular arc. Rainbows caused by sunlight always appear in the section of sky directly opposite the sun.