Explain the difference between the functions of a telescope and a microscope.

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(N/A) telescope is designed to view distant objects. It increases the visual angle subtended by far-off objects at the eye,allowing us to resolve details that are otherwise indistinguishable due to their large distance. Thus,the primary function of a telescope is to increase the resolving power.
Conversely,a microscope is designed to view tiny,nearby objects. It produces a magnified image of an object that is too small to be seen clearly by the naked eye. Thus,the primary function of a microscope is to increase the magnification.

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When the final image is formed at the least distance of distinct vision $(D)$ from the eye,the magnifying power of a simple microscope is ($f$ is the focal length of the lens):

$A$ person using a lens as a simple microscope sees an:

In a Ramsden eyepiece,two planoconvex lenses,each of focal length $f$,are separated by a distance of $12 \ cm$. The equivalent focal length (in $cm$) of the eyepiece is:

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