Question

A light ray falls on a mirror and deviates by ${60}^0$. Then the angle of reflection will be :

• A. ${30}^0$
• B. ${60}^0$
• C. ${90}^0$
• D. ${180}^0$

Answer 1

The correct option is B ${60}^0$

on a plane mirror

$\begin{array}{cc}i& =x\\ \text{Deviation}=\delta & =180-i\\ & =180-x\\ 60& =180-\gamma \\ & r={60}^{\circ }\end{array}$

Hence option $B$ is correct