Magnitude may refer to:
Mathematics
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Euclidean vector, a quantity defined by both its magnitude and its direction
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Magnitude (mathematics)
In mathematics, the magnitude or size of a mathematical object is a property which determines whether the object is larger or smaller than other objects of the same kind. More formally, an object's magnitude is the displayed result of an order th ...
, the relative size of an object
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Norm (mathematics), a term for the size or length of a vector
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Order of magnitude, the class of scale having a fixed value ratio to the preceding class
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Scalar (mathematics), a quantity defined only by its magnitude
Astronomy
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Absolute magnitude, the brightness of a celestial object corrected to a standard luminosity distance
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Apparent magnitude, the calibrated apparent brightness of a celestial object
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Instrumental magnitude Instrumental magnitude refers to an uncalibrated apparent magnitude, and, like its counterpart, it refers to the brightness of an astronomical object seen from an observer on Earth, but unlike its counterpart, it is only useful in relative compariso ...
, the uncalibrated apparent magnitude of a celestial object
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Magnitude (astronomy)
In astronomy, magnitude is a unitless measure of the brightness
Brightness is an attribute of visual perception in which a source appears to be radiating or reflecting light. In other words, brightness is the perception elicited by the lumi ...
, a measure of brightness and brightness differences used in astronomy
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Magnitude of eclipse or geometric magnitude, the size of the eclipsed part of the Sun during a solar eclipse or the Moon during a lunar eclipse
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Photographic magnitude, the brightness of a celestial object corrected for photographic sensitivity, symbol ''m
pg''
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Visual magnitude, the brightness of a celestial object in visible, symbol ''m
v''
Seismology
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Seismic magnitude scales, the energy in an earthquake, measures include:
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Moment magnitude scale, based on seismic moment, supersedes the Richter scale
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Richter magnitude scale, the energy of an earthquake, superseded by Moment scale
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Surface-wave magnitude
The surface wave magnitude (M_s) scale is one of the magnitude scales used in seismology to describe the size of an earthquake. It is based on measurements of Rayleigh surface waves that travel along the uppermost layers of the Earth. This ma ...
, based on Rayleigh surface wave measurement through heat conduction
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Seismic intensity scales, the local severity of a quake
Arts and media
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Magnitude (Community), a recurring character from the television series ''Community''
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