Question

A ray of light is incident on the air-glass interface from air to glass. Which of the given angles cannot be a Brewster's angle $\left({\theta }_B\right)$?

• A. ${70}^{\circ }$
• B. ${60}^{\circ }$
• C. ${53}^{\circ }$
• D. ${45}^{\circ }$

Answer 1

The correct option is D ${45}^{\circ }$


At Brewster's angle,
${\theta }_B+r={90}^{\circ }$ and $r<{\theta }_B$

Only ${45}^{\circ }$ does not satisfy required condition.