How can you colculate the magnifiction of a microscope ?

How can you feel air ?

How can you control fire?

From the data of four lenses given in Q.4 which one will you select as objective of a compound microscope and which one as eye lens ? How can the magnifying power of such a microscope be increased ?

How can we increase the resolving power of a microscope ?

How shall you increase the magnifying power of a simple microscope?

How can you oberve the Protzoans?