Question

Numericals
1. Calculate the refractive index of glass if speed of light in glass is 2x109 m/s.
70​

Answer 1

Explanation:

$refractive \: index = \frac{speed \: of \: light \: in \: vacuum}{speed \: of \: light \: in \: medium}$

$= \frac{3 \times {10}^{8} }{2 \times {10}^{9} } = \frac{3}{20} = 0.15$

Therefore, it is your answer.

I hope it helps you. If you have any doubts, then don't hesitate to ask.