On which of the following does the magnifying | vedclass

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(C) The magnifying power $(m)$ of an astronomical telescope is defined as the ratio of the angle subtended by the image at the eye to the angle subten

Vedclass · Accepted Answer

The focal length of the objective and that of the eye piece

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(C) The magnifying power $(m)$ of an astronomical telescope 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.For a telescope in normal adjustment,the magnifying power is given by $m = \frac{f_o}{f_e}$,where $f_o$ is the focal length of the objective lens and $f_e$ is the focal length of the eyepiece.When the image is formed at the least distance of distinct vision $(D)$,the formula is $m = \frac{f_o}{f_e} (1 + \frac{f_e}{D})$.In both cases,the magnifying power depends on the focal lengths of both the objective and the eyepiece. Thus,option $(C)$ is correct.

On which of the following does the magnifying power of a telescope depend?

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