In a certain time, light travels 4.55 km in a vacuum. during the same time, light travels only 3.50 km in a liquid. what is the refractive index of the liquid?

The refractive index of the liquid is 1.3

Explanation:

Refractive index is a dimensionless number that describes how fast light travels through a material.

It is also defined as speed of light in vacuum to speed of light in the medium.

Refractive index = speed of light in vacuum/ speed of light in liquid

Given;

speed of light in vacuum = 4.55 km/t

speed of light in liquid = 3.5 km/t

Refractive index = 4.55/3.5

Refractive index = 1.3

Therefore, the refractive index of the liquid is 1.3