Draw a diagram to show how a converging lens held close to the eye acts as a magnifying glass. Why is it usual to choose a lens of short focal length for this purpose rather than one of long focal length?

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Solution

Magnifying glass:

A lens with a short focal length is used so as to obtain greater magnification.

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Draw a diagram to show how a converging lens held close to the eye acts as a magnifying glass. Why is it usual to choose a lens of short focal length for this purpose rather than one of long focal length?

Magnifying glass: A lens with a short focal length is used so as to obtain greater magnification.

Magnifying glass:

A lens with a short focal length is used so as to obtain greater magnification.