Question

A Right circularly polarized (RCP) plane wave is incident at an angle of ${60}^{\circ }$ to the normal, on n air-dielectric interface. If the reflected wave is linearly polarized, the relative dielectric constant ${ϵ}_{r_2}$ is

Answer 1

Ans : (d)

The reflected wave is linearly polarized when circularly polarized wave is incident under Brewster's angle of incidence.

$tan{\theta }_B=\sqrt{\frac{{ϵ}_{r_2}}{{ϵ}_{r_1}}}=tan{60}^{\circ }$

${ϵ}_{r_2}=3$