The index of refraction for flint glass is 1.5.This means that
A)light travels faster in this medium than it does in vacuum.
B)the wavelength of light passing through glass is 1.5* as long as it is in vacuum.
C)the speed of light is slower in this medium than it is in vacuum.
D)a ray of light is refracted away from the normal as it passes from air into glass.

Question

Quizplus · Accepted Answer

The index of refraction of a medium is defined as the ratio of the speed of light in vacuum to the speed of light in that medium. Therefore, a higher index of refraction implies that light travels slower in that medium than it does in vacuum. Since the index of refraction for flint glass is 1.5, it means that the speed of light is slower in flint glass than it is in vacuum.

The Index of Refraction for Flint Glass Is 1