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An object is clearly seen through an astronomical telescope of length $50 \mathrm{~cm}$. The
focal lengths of its objective and eyepiece respectively, can be
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focal lengths of its objective and eyepiece respectively, can be
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The correct answer is:
$45 \mathrm{~cm}$ and $5 \mathrm{~cm}$
(A)
$\ell=f_{0}+f_{e} ; \quad f_{0}$ and $f_{0}$ are positive.
Magnifying power $=\frac{f_{0}}{f_{e}}>1$
$\ell=f_{0}+f_{e} ; \quad f_{0}$ and $f_{0}$ are positive.
Magnifying power $=\frac{f_{0}}{f_{e}}>1$
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