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

In simple definition ⤵️

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

According to books ⤵️

In geometric optics, the angle of incidence is the angle between a ray incident on a surface and the line perpendicular to the surface at the point of incidence, called the normal. The ray can be formed by any wave: optical, acoustic, microwave, X-ray and so on.

Explanation:

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