Question

A beam of light strikes a piece of glass at an angle of incidence of ${60}^{\circ }$ and the reflected beam is completely plane polarized. The refractive index of the glass is:

• A. $1.5$
• B. $\sqrt{3}$
• C. $\sqrt{2}$
• D. $\left(\frac{3}{2}\right)$

Answer 1

The correct option is B

$\sqrt{3}$

Use Brewster’s law
$\mu =tan\left({60}^{\circ }\right)=\sqrt{3}$