Question

What is angle of deviation define

Answer 1

Hey mate, here is your answer.: -)

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

HOPE it helps to you!!!!!

Answer 2

the angle between the incident ray and the emerging ray.