If you want to build a telescope having the least possible amount of chromatic aberration,you should use:
A) a front lens that has been coated with a special material to reduce refraction.
B) a front lens that is composed of two closely spaced lenses made of different kinds of glass.
C) the thinnest front lens that you can obtain.
D) mirrors instead of lenses.

Question

Quizplus · Accepted Answer

Mirrors do not suffer from chromatic aberration, as they do not disperse light like lenses do. Therefore, using mirrors instead of lenses is the best choice to achieve the least possible amount of chromatic aberration.

If You Want to Build a Telescope Having the Least