A major advantage of a Newtonian reflector over a refractor is
A) the elimination of chromatic aberration.
B) the central hole in the mirror is smaller.
C) its compact size.
D) there are only two lenses to grind.
E) the elimination of the secondary mirror.

Question

Quizplus · Accepted Answer

Newtonian reflectors use mirrors instead of lenses, which eliminates chromatic aberration. This aberration occurs in refractors because lenses refract different colors of light by different amounts, leading to color fringes around objects. Mirrors reflect all colors of light equally, avoiding this issue.

A Major Advantage of a Newtonian Reflector Over a Refractor