Question

In the formation of primary rainbow, the sunlight rays emerge at minimum deviation from rain drop after ______.

Options

• One, internal reflection and one refraction 

• One internal reflection and two refraction 

• Two internal reflections· and one refraction 

• Two internal reflections and two refractions

Answer 1

In the formation of primary rainbow, the sunlight rays emerge at minimum deviation from rain drop after one internal reflection and two refraction.

Explanation:

A primary rainbow will occur when a solar ray is refracted three times and reflected once by the droplet. A secondary rainbow will develop if the beam is being refracted twice and reflected twice.