The maximum magnification that can be obtained with a convex lens of focal length $2.5\, cm$ is (the least distance of distinct vision is $25\, cm$).

Magnifying power of a simple microscope is (when final image is formed at $D = 25 \ cm$ from eye)

In a compound microscope,the focal length and the aperture of the objective lens used are respectively:

$A$ compound microscope is designed with two symmetric biconvex lenses. The objective lens is cut vertically, creating two identical plano-convex lenses. One of them is used in place of the original objective lens. To retain the same magnification while keeping the object distance unchanged, the tube length has to be

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

The magnification of a compound microscope is $30$. If the focal length of the eyepiece is $5 \, cm$,what is the magnification of the objective lens?