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AIEEE 2002 Physics Solved Paper
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© examsnet.com
Question : 59
Total: 75
An astronomical telescope has a large aperture to
reduce spherical aberration
have high resolution
increase span of observation
have low dispersion
Validate
Solution:
KEY CONCEPT : The resolving power of a telescope
R
.
P
=
D
122
λ
where
D
=
diameter of the objective lens
λ
=
wavelength of light.
Clearly, larger the aperture, larger is the value of
D
,
more is the resolving power or resolution.
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