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(i) Draw a neat labelled ray diagram of ...

(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 ?

Text Solution

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(i)
(ii) The objective forms a real, inverted magnified image of the object. This serves as the object for the second lens, the eyepiece, which functions essentially like a simple microscope or magnifier, produces the final image, which is enlarged and virtual.
To achieve a large magnification of a small object, both the objective and the eyepiece should have small focal lengths.
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