Question

When the incident light itself is polarized with the electric field vector in the plane of incidence, then if the angle of incidence is ${\theta }_p$, there is no?

Answer 1

Brewster’s law:

1. According to Brewster’s law, when an unpolarized light of known wavelength is incident on a transparent substance surface, it experiences maximum plan polarization at the angle of incidence whose tangent is the refractive index of the substance for the wavelength.
2. The law states that the p-polarized rays vanish completely on different glasses at a particular angle.
3. Further, the polarization angle is also called Brewster’s angle $\left({\theta }_p\right)$. It is an angle of incidence where the ray of light having a p-polarization is transmitted through a dielectric surface that is transparent without any reflection. While the unpolarized light at this angle is transmitted, the light is reflected from the surface.

1. Brewster's angle is the angle of incidence for which there is no reflection from the media interface i.e it is the angle of incidence for which the reflection coefficient is zero.
2. Therefore, when the angle of incidence is ${\theta }_p$, there is no reflected light if the incident light itself is polarized with an electric field in the plane of incidence.