Question

Two plane mirrors are kept at
right angles to each other. A
ray of light is incident on any
of the two mirrors at an
angles of incidence (i) such
that the finally reflected ray, after reflection from
the other mirror, is parallel to the incoming ray,
then i is​

Answer 1

$\huge\boxed{ANSWER:-}$

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since, angle of incidence is equal to angle of reflection....

thus, by applying this we get the answwr as above