Question

In order to increase the magnifying power of a compound microscope

• A. The focal lengths of the objective and the eye piece should be small
• B. Objective should have small focal length and the eye piece large
• C. Both should have large focal lengths
• D. The objective should have large focal length and eye piece should have small

Answer 1

The correct option is A The focal lengths of the objective and the eye piece should be small

As we know,

$|m|\propto \frac{1}{f_0{f}_e}$

hence,

The focal lengths of the objective and the eyepiece should be small.