# Angular Magnification of a Telescope

**Formula:** `M = f`

_{o} / f_{e}

Where:

is the angular magnification of the telescope.*M*is the focal length of the objective lens.*f*_{o}is the focal length of the eyepiece lens.*f*_{e}

The angular magnification of a telescope is defined as the ratio of the objective lens's focal length to that of the eyepiece. This formula is a fundamental concept in optics and is used to determine how much larger an object appears when viewed through a telescope as compared to the naked eye. A higher magnification factor suggests a larger image of the observed object. This principle is widely applied in astronomical and terrestrial telescopes to allow observers to see distant objects in greater detail.

Tags: Optics, Telescope, Magnification, Astronomy