Question

What are the basic principles that allow a telescope to function?

Answer 1

Telescopes functions based on two principles 1 Refraction 2 Reflection.

Explanation:

In first type a lens is used to collect light.this is what we call objective
In second type a mirror is used to collect light.This is reflector.
3 main functions of telescope
1 It collect more light
2 It resolves close objects
3 It magnifies.
Pictuire credit Meade com