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Simple Microscope Angular Magnification

The eyepiece ...

Question

The eyepiece of a refracting telescope has f =9 cm. In the normal setting, separation between objective and eyepiece is 1.8 m. Find the magnification.

A

20

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B

19

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C

18

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D

21

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Solution

The correct option is B $19$
We have,

$f_{0} = 1.8 - 0.09 = 1.71 m$

Also $M = \frac{f_{o}}{f_{e}} = \frac{171}{9} = 19$

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