Question

A ray of light in normally incident on one face of an equilateral glass prism . Answer the following

What is the angle of incidence on the firt face of the prism , what is the angle of refraction from the first face , what will be the angle of incidence at the second face , will the ray suffer minimum deviation .

Answer 1

Ans:-

(a) If the incident ray normal to prism then angle of incidence is 0 degree.

(b) In this case the angle of refraction from the first face r1 = 0 degree.

(c) As the prism is equilateral so A = 60 degree and r1 = 0 degree. So at the second face of the prism, the angle of incidence will be 60 degree.

(d) No the light will not suffer minimum deviation.

Answer 2

Answer:

(a) If the incident ray normal to prism then angle of incidence is 0 degree.

(b) In this case the angle of refraction from the first face r1 = 0 degree.

(c) As the prism is equilateral so A = 60 degree and r1 = 0 degree. So at the second face of the prism, the angle of incidence will be 60 degree.

(d) No the light will not suffer minimum deviation.