Question

refractive index of a medium is 2.4 find the speed of light in this medum

Answer 1

speed of light in air = 3 × 10^8 m/s

refractive index = 2.4

But,

Refractive index of a medium = c / (speed of light in that medium)

==> 2.4 = 3 × 10^8 m/s / v

==> v = 3 × 10^8 / 2.4

==> v = 1.25 × 10^8 m/s

Answer 2

Answer:

1.25×10^8m/s

Explanation:

refrective index of a medium

= speed of light in vacuum/ speed in medium

n = c/v

=> v = c/n = 3×10^8 / 2.4 = 1.25×10^8 m/s

hope this helps you