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An astronomical refracting telescope wil...

An astronomical refracting telescope will have large angular magnification and high angular resolution, when it has an objective lens of

A

large focal length and large diameter

B

small focal length and small diameter

C

larger focal length and small diameter

D

small focal length and large diameter

Text Solution

Verified by Experts

The correct Answer is:
A
Angular magnification, `m=(f_(0))/(f_(e))`
Angular resolution, `theta=D/(1.22 lambda)`
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