Question

what is the angle of incidence of a ray if the reflected ray is at an angle of 90° to the incident ray ?

Answer 1

Hey friend,

Since the angle of reflection=Angle of incidence,

as stated the angle of reflected Ray is 90°
so angle of reflection is 45°

So angle of incidence would also be 45°

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Answer 2

Answer:

The Angle of Incidence = 45 degrees

W.K.T angle of incidence is always equal to the angle of reflection.

The Angle of Reflection and The Angle of Incidence =  90/2 = 45

Thus Angle of Incidence= Angle of Reflection = 45

Hope it helps you

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Explanation: