Question

A ray of light is incident on air glass interface from air to glass. Which of the given angles can not be Brewster's angle ${\theta }_B$?

• 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.