Question

Light is incident on a glass plate of refractive index 1.732. It is plane polarized on reflection when the incidence angle is

• A. ${75}^o$
• B. ${60}^o$
• C. ${45}^o$
• D. ${30}^o$

Answer 1

The correct option is B ${60}^o$

By Brewster's laq,
$\mu$ = tan(i)
$\therefore$ i = ${\tan }^{-1}$$\mu$
= ${\tan }^{-1}$(1.732) = ${60}^o$