Question

A ray strikes a plane mirror so that the angle between the ray and the reflected mirror is 90 degrees.What is the angle of incidence.​

Answer 1

Answer:

The angle of reflection is equal to the angle of incidence, therefore, when a ray strikes the mirror at 90 degrees, the ray reflects back in the opposite direction on the same path, that is at 90 degrees.

Answer 2

Question ⤵️

A ray strikes a plane mirror so that the angle between the ray and the reflected mirror is 90 degrees.What is the angle of incidence.

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Knowledge required : Angle of incidence = Angle of reflection.

When a ray strikes the mirror at 90 degrees, the ray reflects back in the opposite direction on the same path, that is at 90 degrees.

Answer = 90°