NEET2024PhysicsRay OpticsActual
A light ray enters through a right angled prism at point P with the angle of incidence 30^ as shown in figure. It travels through the prism parallel to its base B C and emerges along the face A C . The refractive index of the prism is:
Options
- A5 2
- B3 4
- C3 2
- D5 4
Correct answer
A. 5 2
Step-by-step solution
In prism, r₁+c=A gathered r₁=90^ -c (1) c= 1 c= ^2-1 gathered Apply Snell's law, on incidence surface aligned 1 30^ = (r₁ ) 1 1 2 & = (90^ -c ) 1 2 & = ^2-1 aligned On squaring 1 4 = ^2-1 ^2= 5 4 = 5 2