Question

The angle of incidence at which reflected light is totally polarized for reflection from air to glass (refractive index n), is:

• A. ${\sin }^{-1}$
• B. ${\sin }^{-1}\left(1/n\right)$
• C. ${\tan }^{-1}\left(1/n\right)$
• D. ${\tan }^{-1}\left(n\right)$

Answer 1

The correct option is D ${\tan }^{-1}\left(n\right)$

According to Brewster's law,

the angle of incidence at which the reflected light is totally polarized for reflection from air to glass is governed by the relation

$n=tan\theta$

$\therefore \theta =ta{n}^{-1}n$