Question

Rainbow is an example of dispersion of sunlight.Expalin its formation.

Answer 1

The diagram illustrates what happens to a single ray of sunlight as it passes through a spherical water drop (actual raindrops are not exactly spherical, but the mechanism is still very similar). Upon entering the drop, the light ray is refracted (or bent) into an angle that depends on the wavelength (or color). Blue light is bent more than red light, with green and yellow in between. The diagram uses a red ray and a blue ray to illustrate how the long-wavelength and short-wavelength light is bent into different angles.