Question

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

(a) 1.25

(b) 5.55

(c) 6.25

(d) 12.25

The question was posed to me in a national level competition.

This key question is from Wave Optics in section Wave Optics of Physics – Class 12

Answer 1

The correct option is (a) 1.25

The explanation is: μ1 = \(\frac {c}{v_1}\)

μ1 = \(\frac {(3 \times 10^8)}{(2.4 \times 10^8) }\)

μ1 = 1.25.