Magnitude

ca:Magnitud

In science, magnitude refers to the numerical size of something: see orders of magnitude.
In mathematics, the magnitude of an object is a non-negative real number, which in simple terms is its length.
In astronomy, magnitude refers to the logarithmic measure of the brightness of an object, measured in a specific wavelength or passband, usually in optical or near-infrared wavelengths: see apparent magnitude and absolute magnitude.
In Seismology , the magnitude is a logarithmic measure of the energy released during an earthquake. See Richter scale.

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