Question

what is angle of devation​

Answer 1

Answer:

The angle of deviation through a triangular prism is defined as the angle between the incident ray and the emerging ray (angle δ). It can be shown that when the angle of incidence i is equal to the angle of refraction r' for the emerging ray, the angle of deviation is at a minimum.

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Answer 2

Explanation:

the angle equal to a difference between the angle of incidence and angle of refraction of ray of light passing through the surface between one medium and another of different refractive index