Question

Light enters from air to glass having the refractive index of 2. What is the speed of the light in the glass? Speed of light in vacuum is 3 × 10଼ /​

Answer 1

Answer:

Given that,

Refractive index μ = 2

Speed of the light in vaccum

$3 \times {10}^{8} \frac{m}{s}$

Speed of the light in glass

$= \frac{speed \: of \: light \: in \: vaccum}{refractive \: index} \\ = \frac{3 \times {10}^{8} }{2} = 1.5 \times {10}^{8} \frac{m}{s}$