How does a refracting telescope work?
a. it uses a concave lens, a convex lens, and a concave mirror to gather and focus light.
b. it uses a concave lens and a convex lens to gather and focus light.
c. it uses two concave lenses to gather and focus light.
d. it uses two convex lenses to gather and focus light.

D

Explanation:

because convex lenses bend light inward

It uses two convex lenses to gather and focus light.

Explanation:

a. a primary source combines several different accounts of an event. b. a primary source generally benefits from having been written after an event.

explanation:

the energy to form plasma comes from heat or electricity in the atmosphere!

sunny~ ☺