(a) Define refraction and state at least three examples of refraction.
(b) Describe dispersion of white light into its constituent colours.

State the laws of refraction of light. State at least three examples of refraction of light.

Durind dispersion of light, the least dispersed colour is :

During dispersion of white light by a prism, the red colour deviates most.

Assertion : There is no dispersion of light refracted through a rectangular glass slab. Reason : Dispersion of light is the phenomenon of splitting of a beam of white light into its constituent colours.

State the Snell's laws of refraction of light.

When white light enters a prism, it gets split into its constituent colours. This is due to

Answer the following: (a) Define wavefront. Use Huygens' principle to verify the laws of refraction. (b) How is linearly polarised light obtained by the process of scattering of light? Find the Brewster angle for air-glass interface, when the refractive index of glass is 1.5 .

During dispersion of white light, which colour (a) deviates least, (b) deviates most?

What do you understand by the statement the refractive index of glass is 1*5 for white light' ?

Define equivalent mass. Describe at least three methods for the determination of equivalent mass of a substance.