Describe the structure of a compound microscope. Derive the formula for its total magnifying power.

Draw course of rays through a compound microscope. Deduce an expression for its magnifying power. How can the magnifying power be increased ?

The magnifying power of a compound microscope is

The magnifying power of the eyepiece of a compound microscope is 6 and the combined magnifying power of the microscope is 84. What is the magnifying power of the objective ?