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Circular Polarization

A circularly ...

Question

A circularly polarized plane wave is incident at an angle of $63^{\circ} t o$ the normal to an air dielectric interface. if the reflected wave is linearly polarized then the relative dielectric constant of the medium is _____

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Solution

$t a n θ_{B} = \sqrt{\frac{ϵ_{r 2}}{ϵ_{r 1}}} H e r e θ_{B} = 63^{\circ} a n d ϵ_{r 1} = 1 ∴ \sqrt{ϵ_{r}} = t a n 63^{\circ} = 1.96 a n d ϵ_{r} = 3.85$

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