A plane mirror is rotated through about an axis in its plane while the incident beam…

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

Problem

A plane mirror is rotated through

\,5^{\circ}\,

about an axis in its plane while the incident beam remains fixed. Through what angle will the reflected beam rotate? (a)

5^{\circ}

(b)

10^{\circ}

(c)

20^{\circ}

(d)

2.5^{\circ}