c = n * v
Where:
* c is the speed of light in a vacuum (approximately 299,792,458 meters per second)
* n is the index of refraction of the material
* v is the speed of light in the material
Therefore, the speed of light in a material can be calculated by dividing the speed of light in a vacuum by the material's index of refraction.
Example:
The index of refraction of water is approximately 1.33. To find the speed of light in water, we can use the equation:
v = c / n
v = 299,792,458 m/s / 1.33
v ≈ 225,407,104 m/s
Therefore, the speed of light in water is approximately 225,407,104 meters per second.
