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The two lenses of a compound microscope ...

The two lenses of a compound microscope are of focal lengths 2 cm and 5 cm. If an object is placed at a distance of 2.1 cm from the objective of focal length 2 cm the final image forms at the final image forms at the least distance of distinct vision of a normal eye. Find the magnifying power of the microscope.

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The correct Answer is:
42 cm, -20, 46.17 cm, -120
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