Chapter 3: Question 30
Which of the following is NOT a reason to use a reflecting telescope rather than a refractor?
A.Heavy lenses, which can only be supported at their edges, tend to deform under their own weight.
B.Lenses absorb light, while mirrors do not.
C.Lenses are harder to focus than mirrors.
D.Lenses are subject to chromatic aberration.
E.A lens must have two precision surfaces; a mirror needs only one.