The absolute refractive indices of two media 'A' and 'B' are 2.0 and 1.5 respectively. If the speed of light in medium 'B' is 2 × 108 m/s, calculate the speed of light in:
(ii) medium 'A'.
Absolute refractive index of medium 'A', `mu_A=2.0`
Absolute refractive index of medium 'B', `mu_B=1.5`
(i) For medium 'B',
Speed of light in vacuum is ⇒v=cμA
(ii) For medium 'A',
Thus, speed of light in medium 'A' is 1.5 x 108 m s-1.