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If the focal length of objective lens is increased, then magnifying power of

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a
Microscope and telescope both will increase
b
Microscope and telescope both will decrease
c
Microscope will increase but that of telescope decrease
d
Microscope will decrease but that of telescope will increase

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detailed solution

Correct option is D

For microscope m=Lf0Dfc⇒M∝1f0 & For telescope m=f0fe⇒M∝f0.


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Telescopes have larger diameter of objective


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