Question

what is angle of incidence​

Answer 1

Answer:

The angle which an incident line or ray makes with a perpendicular to the surface at the point of incidence.

Explanation:

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Answer 2

Answer:

The angle between the incident ray and the normal at the point of incidence is called angle of incidence.

Explanation:

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.So that ray is called normal