PHYSICS · Single correct · CBSE · Physics · Ray Optics and Optical Instruments · Ray Optics and Optical Instruments
Problem
A right-angled isosceles prism (45∘,45∘,90∘) is used in air. A ray enters normally through one of the equal sides and meets the hypotenuse inside the prism. The minimum refractive index of the prism material required so that the ray undergoes total internal reflection at the hypotenuse is
(a) 1.33
(b) 1.62
(c) 1.41
(d) 1.50