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The minimum magnifying power of an astro...

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

A

`M//2`

B

`4M `

C

`M//4`

D

None of the above

Text Solution

Verified by Experts

The correct Answer is:
D
Magnifying power is inversely proportional to the focal length of eyepiece. So, if focal length of the eyepiece is halved, the magnification will be 2M.
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