NEET2020PhysicsRay OpticsActual
A ray is incident at an angle of incidence i on one surface of a small angle prism (with angle of prism A ) and emerges normally from the opposite surface. If the refractive index of the material of the prism is μ , then the angle of incidence is nearly equal to:
Options
- A2 A μ
- Bμ A
- Cμ A 2
- DA 2 μ
Correct answer
B. μ A
Step-by-step solution
r 2 = 0 r 1 = A Apply Snell's law sin   i = μ   sin   r 1 for small angle r 1 = A i = μ A