Question

A plane mirror makes an angle of ${30}^o$ with the horizontal. If a vertical ray strikes the mirror, find the angle between the mirror and the reflected ray ?

Answer 1

From the figure, it can be seen that the angle of incidence is found out to be $30{}^{\circ }$.
From the laws of reflection, we know
$\angle i=\angle r$

$\therefore \angle r=30{}^{\circ }$