Physics

Problem

Which one of the following expressions gives the magnifying power

M

of a reflecting telescope in normal adjustment, where

f_o

is the focal length of the primary mirror and

f_e

is the focal length of the eyepiece? a)

M=\dfrac{f_e}{f_o}

M=\dfrac{f_o}{f_e}

M=1+\dfrac{f_o}{f_e}

M=\dfrac{f_o}{2f_e}