User talk:Amy9lm

Homework

A telescope works by focusing the light from a distant object to form a magnified image. The image is studied with a powerful magnifying LENS, so the object is seen in close-up. Binoculars consist of two telescopes side by side. A reflecting telescope uses a mirror, because mirrors are easier to make and to mount than lenses.

Refracting Telescopes! Apochromat - An apochromat, or apochromatic lens (apo), is a photographic or other lens that has better correction of chromatic and spherical aberration than the much more common achromat lenses.