MHT CET202013 Oct 2020Evening ShiftPhysicsRay OpticsActual
Light travels from an optically denser medium 'A' into the optically rarer medium ^ B ^ with speeds 1 8 10⁸ ~m / s and 2-7 10⁸ ~m / s respectively. The critical angle between them is ( ₁ . and ₂ are the refractive indices of media A and B respectively.)
Options
- A⁻¹ ( 2 3 )
- B⁻¹ ( 3 4 )
- C⁻¹ ( 2 3 )
- D⁻¹ ( 3 4 )
Correct answer
A. ⁻¹ ( 2 3 )
Step-by-step solution
_ A _ B = _ B _ A = V _ B V _ A = 2.7 10⁸ 1.8 10⁸ = 3 2 _ B _ A = 1 C 3 2 = 1 C C = 2 3 or C = ⁻¹ 2 3