Question

The speed of the yellow light in a certain liquid is 2.4 × 10^8 m/s. Find the refractive index of the liquid.

(a) 6.25

(b) 5.73

(c) 1.25

(d) 9.73

This question was addressed to me in an interview.

My question is from Wave Optics in chapter Wave Optics of Physics – Class 12

Answer 1

The correct choice is (c) 1.25

Easy explanation: μ = \(\frac {c}{v_t}\)

μ = 3 × \(\frac {10^8}{2.4}\) × 10^8

μ = 1.25