Show that an incident ray reflected successively from two mirrors inclined at an angle θ to each other is rotated through an angle 2θ.

Show that an incident ray reflected successively from two mirrors inclined at an angle θ to each other is rotated through an angle 2θ.

The diagram in the figure below shows a ray of light undergoing two successive reflection at points X and Y in two mirrors M₁ and M₂ inclined at an angle θ.

Thus, the deviation produced by two inclined mirrors is twice the angle between the mirrors when a ray under goes two successive reflections.

Thank u

Please subscribe to promote our website. Subscription is free.

Click the subscribe button on the to right of the website  and follow the prompts.