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Question

The distance between the eyepiece and the objective lens in a certain compound microscope is 23.0cm . The focal length of the eyepiece is 2.50cm, and that of the objective 0.400cm. What is the overall magnification of the microscope ?

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Solution

Overall magnification of compound microscope is given by formula
M=Lfo.25cmfe where L=distance between the eyepiece and the objective lens,
fo and fe are focal lengths of objective lens and eyepiece lens respectively.
substituting values in formula
M=230.4.252.5
M=575
overall magnification of given compound microscope is -575.

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