Index of Refraction Calculator

Enter the speed of light and the speed of light in a medium, and this calculator will determine the index of refraction. The index fraction is calculated with the formula presented below. This formula is also known as snell’s formula.

Index of Refraction Formula

The formula for calculating a refraction index is as follows:

n = c / v

  • Where n is the index of refraction
  • c is the speed of light in a vaccum = 299,792.46km/s
  • v is the speed of light in a given medium

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