Question

define the normal at the point of incidence​

Answer 1

Answer:

Normal at point of incidence: A line drawn perpendicular on the surface (i.e. making 90° angle with the surface) of an object at the point of incidence is called a normal point of incidence. Angle of incidence: The angle formed between the incident ray and the normal is called the angle of incidence.

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Answer 2

A n s w e r

• The Point of incidence is that point on the surface of the mirror where the incidence ray falls. A line perpendicular to the surface, at the point of incidence, is known as the Normal at the point of incidence.