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Four lenses of focal length +15 cm , +20...

Four lenses of focal length `+15 cm , +20 cm, +150 cm` and `+250cm` are available for making an astronomical telescope. To produce the largest magnification, the focal length of the eye-piece should be

A

`+15cm`

B

`+50cm`

C

`-150cm`

D

`-15cm`

Text Solution

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The correct Answer is:
A
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