Question

Which are advantages of using a reflecting telescope instead of a refracting telescope? Check all that apply.

A) Reflecting telescopes are less expensive.
B) Reflecting telescopes produce clearer images.
C) Reflecting telescopes require only concave lenses.
D) Reflecting telescopes can gather light from objects farther in space.
E) Reflecting telescopes usually take up less space.

Answer 1

A) Reflecting telescopes are less expensive
B) Reflecting telescopes produce clearer images.
D) Reflecting telescopes can gather light from objects farther in space. 

Answer 2

Answer: The correct option are A, B and ,D.

Explanation:

Advantages of reflecting telescope:

• These telescope are cheaper than the refractive telescope.
• They form clear image of an object.
• They do not suffer from chromatic aberrations.
• The are made in big sizes so as to support the objective mirror from the back side.
• Only one side of the objective is need to be perfect this is so because light is reflecting off the surface rather than passing through it.
• They can gather light of an object present farther in a space .
• Curved mirrors are used in this type telescopes.

From the given options the correct option are A, B and ,D.