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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

Small focal length and small diameter

B

Small focal length and large diameter

C

Large focal length and large diameter

D

Large focal length and small diameter

Text Solution

Verified by Experts

The correct Answer is:
C
For astronomical refracting telescope
Angular magnification is more for large focal length of objective lens
`(M.P.=(f_(o))/(f_(e)))`
Resolving power `=(d)/(1.22lambda)`
Resolving power is high for large diameter .
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