Question

A plane mirror is inclined at ${40}^o$ to the floor. An incident ray parallel to the floor strikes the mirror and a reflected ray is formed. What is the angle of reflection?

• A. ${40}^o$
• B. ${50}^o$
• C. ${60}^o$
• D. ${70}^o$

Answer 1

The correct option is B ${50}^o$

From the figure, angle of incidence $i={90}^0-{40}^0$

$i={50}^0$

Hence from laws of reflection $r={50}^0$