Question

The absolute refractive index of a transparent medium is 5/3. Find the speed of the light in the medium.
$given \\ c = 3 \times {10}^{8} m \: per s$

Answer 1

Speed of light in medium1=5/3
Speed of light in medium 2=?
n=c/v
5/3×3×8
10^8
=4×10^9