Question

Rainbow is an example of dispersion of sunlight justify this statement by explaning ,with the help of a labelled diagram the formation of rainbow in the sky dist two essential condition for observing a rainbow

Answer 1

When the sunrays gets contact with the drops of water in rainy season the total internal reflection occurs in yhe water droplet which disperse the white light in 7 colours as a result rainbow arrises

Answer 2

Rainbow forms when sunlight hits the water droplets suspended in the atmosphere and undergoes total internal reflection. When the sunlight comes out of the drop it disperses, where the drop acts like a small prism. This dispersion or breaking up of light into several colors is what forms the rainbow. Hence, rainbow is an example of dispersion of sunlight.

Conditions for rainbow formation are:

1. A rain shower must have occurred so that there is enough moisture in atmosphere.

2. The sun should be in the opposite direction.