A laser beam strikes a plane mirror at from the normal

PHYSICS · Single correct · CBSE · Physics · Light — Reflection and Refraction · Light — Reflection and Refraction

Problem

A laser beam strikes a plane mirror at

30^{\circ}

from the normal. The mirror is then rotated by

10^{\circ}

about an axis perpendicular to its surface. Which of the following gives the change in direction of the reflected beam? (a)

40^{\circ}

(b)

10^{\circ}

(c)

20^{\circ}

(d)

30^{\circ}