In a compound microscope,the intermediate image is

To obtain a magnified image at the distance of distinct vision $(D)$ using a simple microscope,the object should be placed:

$A$ microscope consists of an objective of focal length $1.9 \,cm$ and an eyepiece of focal length $5 \,cm$. The two lenses are kept at a distance of $10.5 \,cm$. If the image is to be formed at the least distance of distinct vision, the distance at which the object is to be placed before the objective is (least distance of distinct vision is $25 \,cm$). (in $\,cm$)

Write the equation of magnification for a simple microscope when the image is formed at the near point.

In a compound microscope,the magnification will be large if the focal length of the eyepiece is:

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