Question

State brewsters law.
The value of brewster's angle for a transparent medium is different for light of different colours. give reason?

Answer 1

Brewster's Law: It states that when light is incident at polarising angle at the interface of a refracting medium, the refractive index of the medium is equal to the tangent of the polarising angle.

As Brewster angle depends on the refractive index and wavelength, so it is different for different colours.