Two plane mirrors are placed at right angles to each other. A ray of light incident on one, after re

Question

Two plane mirrors are placed at right angles to each other. A ray of light incident on one, after reflection, falls on the other. The ray after reflection from the second mirror will be\

Professor PC Thomas Classes · Answer

Mirror $\mathrm{OM}_{1}$ and the normal BE to $\mathrm{OM}_{2}$ are parallel. The incident ray AB and reflected ray CD make angles i each with these parallel lines. Hence the incident ray and reflected ray are parallel.\