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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 large diameter

B

Large focal length and small diameter

C

Large focal length and large diameter

D

Small 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_(0))/(f_(e)) )`
Resolving power = `(d)/(1.22 lambda)`
Resolving power is high for large diameter.
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