Question

A parallel polarized wave is incident from air into paraffin having relative permittivity 3, the value of its Brewster angle is

Answer 1

Answer

Brewster angle is given by

$\theta=\tan^{-1} (\sqrt{\frac{\epsilon_{r'}}{ \epsilon_{r} }})$

$=\tan^{-1} (\sqrt{\frac{3}{1}}) =60^°$