Telescope Magnification
The angular magnification of an astronomical (refracting) telescope. The negative sign indicates an inverted image.
Variables
Derivation
Derived from the ratio of the angle subtended by the image to the angle subtended by the distant object. The objective forms an image at its focal point, which coincides with the focal point of the eyepiece.
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Common questions
What is the Telescope Magnification formula?
Telescope Magnification is written M = -fₒ/fₑ. The angular magnification of an astronomical (refracting) telescope. The negative sign indicates an inverted image. It belongs to Optics, under Optical Instruments.
What are the units in M = -fₒ/fₑ?
In SI units, M is angular magnification (dimensionless); f_o is focal length of objective, measured in m; f_e is focal length of eyepiece, measured in m.
How is the Telescope Magnification formula derived?
Derived from the ratio of the angle subtended by the image to the angle subtended by the distant object. The objective forms an image at its focal point, which coincides with the focal point of the eyepiece. The result is M = -fₒ/fₑ.