Microscopes have 2 convex lens and telescopes too while microscopes are used to look at cells and microscopic organisms.
A mirror instead of and objective lens (:
Actually, they don't. They could've been Spuares, but Galileo had a different idea. Plus, they are a better shape for eyes.
Pieces of concave glass, called lens.
Most telescopes use refractor lenses. Sometime a telescope will use reflector lenses.
Refracting telescopes use a main lens made from glass and called the objective lens.
If you are comparing the biggest telescopes in each type, that's because a large refracting telescope needs a huge lens, which gets expensive; also, the lens can't be supported, while a mirror can.
Ground-based telescopes, and space telescopes. Or: refracting telescopes (main collector is a lens), and reflecting telescopes (main collector is a mirror). Or: Home telescopes (small ones), and professional ones (larger and more expensive).
It used to be done by casting the lens in a rough shape, then hand polishing. Lenses today are cut and polished with lasers.
A refracting telescope is a type of telescope that uses a lens as its objective to form an image. This is different from other type of telescopes because it has a objective lens.
Refracting telescopes use a main lens made from glass and called the objective lens.
The answer is telescopes are used to look at the stars and the microscope is used to look at small things such as organs, bug insides, and other small objects.