Bacteria can be seen only _________.

Q. Dispersion of light as seen in a prism can also be observed in a rectangular glass slab.

Q.
A lens is used in a magnifying glass.

Q. A lady uses + 1.5 D glasses to have normal vision from 25 cm onwards. She uses a 20 D lens as a simple microscope to see an object. Find the maximum magnifying power if she uses the microscope (a) together with her glass (b) without the glass. Do the answers suggest that an object can be more clearly seen through a microscope without using the correcting glasses?