Question

Define the term angle of deviation.
In ur own words. Fastttttttttt.....

Answer 1

the perpendicular distance between the incident ray and the refracted ray.

Answer 2

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