Questions
An astronomical refracting telescope will have large angular magnification and high angular resolution, when it has an obiective 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
detailed solution
Correct option is C
For telescope, angular magnification =f0fe Angular resolution =D1.22λ should be large. So, objective lens should have large focal length (f0) and large diameter D for large angular magnification and high angular resolution.Talk to our academic expert!
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Telescopes have larger diameter of objective
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