Question

What is a reflector telescope?

Answer 1

A telescope that uses mirrors.

Explanation:

All modern telescopes are Reflector Telescopes. In the beginning telescopes were made using lenses. But the problem with lenses is that they can suffer from chromatic aberration, a condition in which different colored images will form at different places. This problem was rectified by Isaac Newton who used mirrors instead of lenses in telescopes. The reflector telescope contains two mirrors, a primary large mirror, which is parabolic and collects light directly from a distant object.

The secondary mirror which is smaller and flat, collects light reflected from the primary mirror and focuses it onto the eye piece.

The larger the collecting area of the mirror the further and better you can see.