(a)What is the angle of incidence on the first face of the prism?

(b)What is the angle of refraction from the first face of the prism?

(c)What will be the angle of incidence at the second face of the prism?

(d)Will the light ray suffer minimum deviation by the prism?

Solution:

(a) The angle of incidence is 0 degrees when the incident ray is normal to the prism.

(b) The refraction angle from the prism’s first face, r1 = 0 degrees

(c) Because the prism is equilateral, A equals 60 degrees and r1 equals 0 degrees . As a result, the angle of incidence at the prism’s second face will be 60 degrees.

(d) No, there will be no minimal deviation in the light ray.