Question

A ray of light is incident on a 60 prism of glass of refractive index 1.5 at an angle of 40 degrees. Fine the angle of emergence of the ray

Answer 1

Explanation:

60° prism has a refractive index of 1.5 Calculate the angle of incidence for minimum deviation , the angle of. emergence.Hope this would be

Answer 2

Explanation:

n= sin i/ sin r so sin r= sin i/ n = sin 40/1.5 = 0.4285

so r= 25.4 degree

A = r +r' so r' = A-r= 60-25.4 = 34.6 degree

n = sin i'/ sin r' so sin i' = n × sin r' = 1.5× sin 34.6 = 0.85176 so i'= 58.4 degree