MHT CET Physics question
A ray of light is incident on the surface of separation of a medium with the velocity of light at an angle and is refracted in the medium at an angle , what will be the velocity of light in the medium? [AFMC 1998]
Answer: (A)
Solution
μ = sin45°/sin30° = √2 so v = 3×10⁸/√2 = 2.12×10⁸ m/s; the other speeds do not equal c/√2. Hence the correct option is (a).