Question

Choose all that apply. Refraction telescopes:
are used to pick up the faintest objects in the sky
require less maintenance
are used by professional astronomers
have small lengths compared to other telescopes
are used when image quality is important

Answer 1

Answer:

ans1 ,2 3

Explanation:

Answer 2

2nd and 4th are probably wrong because they are very huge and difficult to maintain. Other option not so sure.