Question

The refractive index of a transparent material is $3/2$. The speed of the light in that medium is _______

Answer 1

We know that $\mu =\frac{c}{v}$

where $v$=speed of light in medium

$c$=speed of light in vacuum

and $\mu$=refractive index of medium

Now, $\frac{3}{2}=\frac{3\times {10}^8}{v}$

$⟹v=2\times {10}^{8}m/s$