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Reflection of Plane Wave at Oblique Incidence (Part 2)

A Right circu...

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

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Solution

Ans : (d)

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

$t a n θ_{B} = \sqrt{\frac{ϵ_{r_{2}}}{ϵ_{r_{1}}}} = t a n 60^{\circ}$

$ϵ_{r_{2}} = 3$

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