Question

The focal length of objective lens and eyepiece for a compound microscope are $0.95$ and $5$ cm and they are placed at $20$ cm from each other final image is formed at $25$ cm in eyepiece find the magnifying power of the microscope?

Answer 1

$L=20cm$

$f_o=0.95cm$

$f_e=5cm$

$D=25cm$

${\mu }_p=\frac{LD}{f_o{f}_e}=\frac{20\ast 25}{0.95\ast 5}=105.26$