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Problem Faced by Surface Based Telescope and Telescopes in Space

The minimum m...

Question

The minimum magnifying power of telescope is $M$ . If the focal length of its eye lens is halved, the magnifying power will become:-

A

M / 2

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B

2 M

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C

3 M

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D

4 M

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Solution

The correct option is B $2 M$
As we know,
$m \propto \frac{1}{f_{e}}$
So when focal length is halfed then magnifying power is doubled.

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