Physics

Problem

A compound microscope has an objective of focal length

f_{o}=0.40\,\text{cm}

and an eyepiece of focal length

f_{e}=2.5\,\text{cm}

. The distance between the objective’s focal plane and the eyepiece is

L=16\,\text{cm}

. Taking

D=25\,\text{cm}

, calculate the approximate magnifying power

M

when the final image is at infinity. a) 440 b) 400 c) 160 d) 625