Question

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

Answer 1

Correct Answer - A
Angular magnification, `m=(f_(0))/(f_(e))`
Angular resolution, `theta=D/(1.22 lambda)`