(i) Draw a neat labelled ray diagram of a compound microscope . Explain briefly its working .
(ii) Why must both the objective and the eye-piece of a compound microscope have short focal lengths ?

Explanation

### Step-by-Step Solution:

#### (i) Ray Diagram of a Compound Microscope:

1. **Draw the Lenses**: Start by drawing two convex lenses. The left lens is the objective lens (with focal length \( f_o \)), and the right lens is the eyepiece lens (with focal length \( f_e \)).

2. **Label the Lenses**: Label the left lens as "Objective" and the right lens as "Eyepiece".

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