Magnification by a lens would be greater if light
A)propagated instantaneously.
B)traveled faster in glass than it does.
C)traveled slower in glass than it does.
D)beams spread less.
E)none of the above

Question

Quizplus · Accepted Answer

The magnification provided by a lens is directly influenced by the refractive index of the lens material. The refractive index is the ratio of the speed of light in a vacuum to its speed in the lens material. Therefore, the slower the speed of light in the lens material, the higher the refractive index, and the greater the magnification. Hence, the magnification of a lens would be greater if light traveled slower in the lens material, i.e., option C is correct.

Magnification by a Lens Would Be Greater If Light