The magnifying power of a simple microscope can be increased if we use an eyepiece of:

$A$ microscope has an objective of focal length $1.5\, cm$ and an eye-piece of focal length $2.5\, cm$. If the distance between objective and eye-piece is $25\, cm$,the approximate value of magnification produced for a relaxed eye is?

The least distance of distinct vision is $25 \ cm$. Find the magnifying power of a simple microscope of focal length $5 \ cm$ if the final image is formed at the least distance of distinct vision.

In order to increase the magnifying power of a compound microscope:

What is a compound microscope? Explain its construction with the help of a figure.

If the tube-length $(L)$ of a compound microscope increases,then its magnification . . . . . . .