A refracting telescope has a magnification M. If the focal length of the objective lens is doubled and the eyepiece focal length is halved, what is the new magnification?
A) 4M
B) 2M
C) M/2
D) M/4
E) M
Question 2
The focal length of the objective lens of a telescope is 0.20 m and the eyepiece has a focal length of 1.6 m. What is the length of this telescope?
A) 8.0 m
B) 1.4 m
C) 0.90 m
D) 1.6 m
E) 1.8 m