# Refractive Index Calculator

The index of refraction or refractive index 'n' of a material is a dimensionless number that describes how light propagates through that medium. It varies with the wavelength of light. Index of Refraction can be calculated by entering the speed of light in a vacuum (c) and speed of light in particular medium (v) in refractive index calculator. The snell's law calculator divides the speed of light in vacuum by speed of light in particular medium to find the refractive index.

### Example:

Find the refractive index of a medium if the speed of light in a vacuum is 25 and the speed of light in particular medium is 5?

#### Solution:

Index of Refraction n = 25 / 5

= 5