Question

Answer the following with respect to the ‘Formation of Rainbow’:

1. Draw a neat diagram to show the formation of rainbow.
2. Name any two natural processes involved in the formation of a rainbow.
3. What does a small droplet of water act as?

Answer 1

(a)

(b) Rainbow is a beautiful natural phenomenon. It is the combined effect of a number of natural processes. It is the combined effect of dispersion, refraction and total internal reflection of light.

(c) When light rays from the Sun enter these droplets, it gets refracted and dispersed. Then there is internal reflection as shown in the figure, and after that, once again, the light gets refracted while coming out of the droplet. All three of these processes together produce the rainbow.