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NEET 2018 Physics and Chemistry
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Question : 13
Total: 90
An astronomical refracting telescope will have large angular magnification and high angular resolution, when it has an objective lens of
[NEET 2018]
small focal length and large diameter
large focal length and small diameter
small focal length and small diameter
large focal length and large diameter
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Solution:
👈: Video Solution
For telescope, angular magnification
=
f
0
f
E
So, focal length of objective lens should be large
Angular resolution
=
D
1.22
λ
should be large.
So, objective should have large focal length
(
f
0
)
and large diameter D.
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