The optical path for visible light in a lens is
A)the same as the geometrical path.
B)the same no matter what portion of the lens it passes through.
C)the same as the optical path for ultraviolet.
D)independent of the material of which the lens is constructed.
E)is increased when the index of refraction is increased.

Question

Quizplus · Accepted Answer

The optical path length is the product of the physical path length and the refractive index of the material. Therefore, when the index of refraction increases, the optical path length also increases, as light travels slower in materials with higher refractive indices.

The Optical Path for Visible Light in a Lens Is