Large optical telescopes are reflectors rather than refractors because mirrors:
A. are much easier to clean than lenses.
B. are unaffected by light pollution, compared to lenses.
C. can be used with different eyepieces, unlike lenses.
D. can be made of lower quality materials than those used for lenses.
Answer:D
Large optical telescopes are reflectors rather than refractors because mirrors:
A. are much easier to clean than lenses. B. are unaffected by light pollution, compared to lenses. C. can be used with different eyepieces, unlike lenses. D. can be made of lower quality materials than those used for lenses.