Write a relation for the angle of deviation (δ) for a ray of light passing through an equilateral prism

In a prism the ray of light suffers refraction at two faces. The prism produces a deviation at the first surface and another deviation at the second surface. Thus a...

(i) i2 = i1 (ii) Angle of deviation is minimum Explanation: In minimum deviation position, the refracted ray inside the prism travels parallel to it if the prism is equilateral and the...

(i) As the ray is suffering minimum deviation in an equilateral glass prism so i1 = i2  ∴ i2 = 48o  (ii) If the angle of incidence is changed to (a) 30o, the angle of...

(a) If the incident ray normal to prism then angle of incidence is 0o. (b) In this case the angle of refraction from the first face r1 = 0o. (c) As the...

The light ray bends at both the surfaces of prism towards its base.

The deviation produced by the prism does not depend on the size of prism.

Given, Angle of incidence, i = 48° Refracting angle, A = 60° Angle of minimum deviation, δmin =? As δmin = 2i – A δmin = 2(48) – 60 δmin = 36°

Both deviation and dispersion. Hint: When a white light ray falls on the first surface of a prism, light rays of different colours due to their different speeds in glass get...

1. reflected ray

The relationship between angle of incidence A + δm = 2i