Maximum magnification produced by a simple microscope of focal length $f=5 \,cm$ is

$A$ simple microscope is used to see an object first in blue light and then in red light. Due to the change from blue to red light, what is the effect on its magnifying power?

The magnifying power of a simple microscope is $6$. The focal length of its lens in metres will be,if the least distance of distinct vision is $25\,cm$.

Which type of electromagnetic waves are used in an optical microscope? Why?

The objective lens of a compound microscope produces a magnification of $10$. In order to get an overall magnification of $100$ when the image is formed at $25 \, cm$ from the eye,the focal length of the eye lens should be:

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