If both the object and the image are at infin | vedclass

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(C) For a refracting telescope,the magnifying power $(m)$ is defined as the ratio of the angle subtended by the image at the eye to the angle subtende

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The ratio of the focal length of the objective and the eyepiece

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(C) For a refracting telescope,the magnifying power $(m)$ is defined as the ratio of the angle subtended by the image at the eye to the angle subtended by the object at the objective.When the object is at infinity,the image formed by the objective lens is at its focal plane $(f_o)$.When the final image is also at infinity (normal adjustment),the eyepiece is positioned such that the image formed by the objective lies at the focal point of the eyepiece $(f_e)$.In this configuration,the magnifying power is given by the formula $m = \frac{f_o}{f_e}$,where $f_o$ is the focal length of the objective lens and $f_e$ is the focal length of the eyepiece.

If both the object and the image are at infinite distances from a refracting telescope,its magnifying power will be equal to:

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