Which one of the following expressions gives the magnifying power of a reflecting…

PHYSICS · Single correct · CBSE · Physics · Ray Optics and Optical Instruments · Ray Optics and Optical Instruments

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}

(b)

M=\dfrac{f_o}{f_e}

(c)

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

(d)

M=\dfrac{f_o}{2f_e}