Question

Define magnifying power if a simple microscope. How can it be increased?

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Updated on : 2022-09-05
Solution
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The magnifying power of the microscope is defined as
Ā the ratio of the angle subtended by the image at the eye to the angle subtended by the object
Ā (assumed to be placed at the least distance of distinct vision D= 25 cm)
Ā at the eye, i.e,Ā 
Magnifying power =
Where F is the focal length of the lens.
The magnifying power of a microscope can be increased by using the lens of short focal length. But it cannot be increased indefinitely.

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