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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Solution

Angle of incidence (i) + Angle of reflection(r) = 90^o
But, as per the laws of reflection, i = r
Therefore, 2 i = 90^o
Or, i = r = 45^o

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

Angle of incidence (i) + Angle of reflection(r) = 90o But, as per the laws of reflection, i = r Therefore, 2 i = 90o Or, i = r = 45o

Angle of incidence (i) + Angle of reflection(r) = 90^o
But, as per the laws of reflection, i = r
Therefore, 2 i = 90^o
Or, i = r = 45^o