A monochromatic light is incident at a certain angle on an equilateral triangular…
PHYSICS · Single correct · CBSE · Physics · Ray Optics and Optical Instruments · Ray Optics and Optical Instruments
Problem
A monochromatic light is incident at a certain angle on an equilateral triangular prism and suffers minimum deviation. If the refractive index of the material of the prism is 3 , then the angle of incidence is :
(1) 90∘
(2) 30∘
(3) 60∘
(4) 45∘