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Question : 3
Total: 8
Why should the objective of a telescope have large focal length and large aperture? Justify your answer.
Solution:
Reasons for having large focal length and large aperture of objective of telescope and their justification.
Large focal length : to increase magnifying power
( ∵ m =
)
Large aperture : to increase resolving power.1 ∕ 2
( ∵ RP =
)
Large focal length : to increase magnifying power
Large aperture : to increase resolving power.
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