Distinguish between :

1. Refraction and Dispersion.
Ans.

Refraction	Dispersion
The phenomenon of change in the direction of light when it passes from one transparent medium to another is called refraction. It occurs when light passes between any two transparent medium.	1. The phenomenon of splitting of light into its component colours is dispersion. 2. It occurs when light passes through a prism.

2. Dispersion of light and Scattering of light. 

Ans.

Dispersion of light	Scattering of light
1. The phenomenon of splitting of light into its component colours is dispersion. 2. It takes place in a prism.	1. When a ray of light is incident on extremely small particles, the particles deflect the light in different directions. This phenomenon is scattering of light. 2. It takes place due to very fine particles in the atmosphere.