Question

1. A ray is incident on a plane mirror. Its reflected ray is
perpendicular to the incident ray. Find the angle of
incidence.

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Answer 1

Answer:

incident ray is also 90 degree because angle of incident is equal to angle of reflection

Answer 2

Answer:

45°

angle of reflection is perpendicular to angle of incidence

angle of incidence + angle of reflection=90°

let angle of incidence be x

w.k.t angle of incidence =anlge of reflection

x+x=90°

2x=90°

x=45°