Question

the speed of light in a glass is 2×10^8 m/sec calculate the refractive index of the glass is​

Answer 1

Let refractive index be $\mu$.

$\therefore \mu = \dfrac{speed \: in \: vacuum}{speed \: in \: medium}$

$\rightarrow \mu = \dfrac{3 \times {10}^{8} }{2 \times {10}^{8} }$

$\rightarrow \mu = 1.5$

So, refractive index is 1.5.