# Astronomical telescope

An astronomical telescope is being used to examine a relatively close object that is only 107.00 m away from the objective of the telescope. The objective and eyepiece have focal lengths of 1.640 and 0.0840 m, respectively. Noting that the expression M = fo/fe is no longer applicable because the object is so close, use the thin-lens and magnification equations to find the angular magnification of this telescope.

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Angular magnification of an astronomical telescope is defined as the ratio of angle subtended at the eye by the final image to the angle subtended at the eye by the object ...

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