Question

Light having a speed in vacuum of3.0�108m/s enters a liquid of refractive index 2.0. In this liquid, its speed will be

A)0.75�108m/s
B)6.0�108m/s
C)1.5�108m/s
D)3.0�108m/s
E)None of the above choices are correct.

Answer 1

Step-by-step explanation:

Given that,

Speed of light in vacuum,
`v=3* 10^8\ m/s`

Refractive index of the liquid, n = 2

We need to find the speed of light in the liquid. Th refractive index of material is given by the ratio of speed of light in vacuum to the speed in the medium. i.e.

`n=(c)/(v)\\\\v=(c)/(n)\\\\v=(3* 10^8)/(2)\\\\v=1.5* 10^8\ m/s`

So, the correct option is (c). Hence, this is the required solution.