Which one of the following expressions gives the approximate overall magnifying power…

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

Problem

Which one of the following expressions gives the approximate overall magnifying power

M

of a compound microscope when the final image is at infinity (normal adjustment)? (a)

M = \left(\dfrac{L}{f_{o}}\right)\left(1+\dfrac{D}{f_{e}}\right)

(b)

M = \left(\dfrac{L}{f_{o}}\right)\left(\dfrac{D}{f_{e}}\right)

(c)

M = \dfrac{L+D}{f_{o}+f_{e}}

(d)

M = \left(\dfrac{f_{o}}{L}\right)\left(\dfrac{D}{f_{e}}\right)