Two plane mirrors and are fixed at right angles to each other along their edges

PHYSICS · Multi-part · CBSE · Physics · Light — Reflection and Refraction · Light — Reflection and Refraction

Problem

Two plane mirrors

M_{1}

and

M_{2}

are fixed at right angles to each other along their edges. A light ray strikes mirror

M_{1}

at a point P making an angle of

30^{\circ}

with the normal to

M_{1}

. (i) Draw the path of the ray as it reflects first from

M_{1}

and then from

M_{2}

. (ii) Calculate the angle of incidence of the ray on

M_{2}

. (iii) Find the angle between the initial incident ray and the final ray emerging after the second reflection.