A light ray strikes a plane mirror at point P making an angle of with the normal
PHYSICS · Single correct · CBSE · Physics · Light — Reflection and Refraction · Light — Reflection and Refraction
Problem
A light ray strikes a plane mirror at point P making an angle of 45∘ with the normal. Which of the following actions will CHANGE the plane of incidence?
(a) Rotating the mirror about the normal at P while keeping the incident ray fixed
(b) Translating the mirror parallel to its surface without any rotation
(c) Rotating the incident ray about the normal at P while keeping the mirror fixed
(d) Rotating the incident ray within its original plane while keeping the mirror fixed