How does the index of refraction relate to the speed of light in a substance?
index of refraction = c/V
where V is the speed of light in the substance, and
c = 3.998*10^8 m/s, is the speed of light in a vacuum.
where V is the speed of light in the substance, and
c = 3.998*10^8 m/s, is the speed of light in a vacuum.