A narrow beam of light makes an incidence angle of with the normal of a plane mirror
PHYSICS · Single correct · CBSE · Physics · Light — Reflection and Refraction · Light — Reflection and Refraction
Problem
A narrow beam of light makes an incidence angle of 30∘ with the normal of a plane mirror. The mirror is then rotated by 8∘ about an axis lying in the mirror and perpendicular to the plane of incidence, while the incident beam remains fixed. After the rotation, what is the angle between the original reflected beam and the new reflected beam?
(a) 32∘
(b) 8∘
(c) 16∘
(d) 30∘