Look up intensity in
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Intensity is a widely-used term, which can refer to: Wiktionary (a portmanteau of wiki and dictionary) is a multilingual, Web-based project to create a free content dictionary, available in over 151 languages. ...

In colloquial use:

• Strength
• Amplitude
• Level
• Magnitude

In physics: Look up strength in Wiktionary, the free dictionary. ... For quantum-mechanical amplitude, see probability amplitude. ... Look up level in Wiktionary, the free dictionary. ... In science, a magnitude is the numerical size of something: see orders of magnitude. ...

• Intensity (physics), power per unit area (W/m²)
• Field strength of electric, magnetic, or electromagnetic fields (V/m, T, etc.)

In optics: In physics, intensity is a measure of the time-averaged energy flux. ... ʐIn physics, the field strength of a field is the magnitude of its vector (spatial) value. ...

• Radiant intensity, power per unit solid angle (W/sr)
• Luminous intensity, luminous flux per unit solid angle (lm/sr or cd)
• Irradiance, power per unit area (W/m²)

In astronomy: In physics, intensity is a measure of the time-averaged energy flux. ... Luminous intensity is a measure of the energy emitted by a light source in a particular direction. ... Irradiance, radiant emittance, and radiant exitance are radiometry terms for the power of electromagnetic radiation at a surface, per unit area. ...

• Radiance, power per unit solid angle per unit projected source area (W·sr^-1·m^-2)

In seismology: Radiance and spectral radiance are radiometric measures that describe the amount of light that passes through or is emitted from a particular area, and falls within a given solid angle in a specified direction. ...

• Mercalli intensity scale, a measure of earthquake impact
• Japan Meteorological Agency seismic intensity, a measure of earthquake impact
• Peak ground acceleration, a measure of earthquake acceleration (g or m/s²)

Other uses: The Mercalli intensity scale is a scale used for measuring the intensity of an earthquake. ... The Japan Meteorological Agency seismic intensity scale (震度 shindo) is a measure used in Japan to indicate the strength of earthquakes. ... Peak ground acceleration is a measure of earthquake intensity. ...

• In video luminous emittance, the luminous flux per unit area (lm/m² or lux)
• Energy intensity, an economic measure of energy consumed per unit of GDP (J/$, etc.)
• Carbon intensity, any of several measures of release of carbon into the environment
• Exercise intensity, a measure of how much work is done during exercise (% of max heart rate)
• Intensity (novel), a novel by Dean Koontz
  • Intensity (TV movie), a 1997 made for TV movie based on the novel

In photometry, illuminance is the total luminous flux incident on a surface, per unit area. ... Energy intensity is a measure of the energy efficiency of a nations economy. ... Carbon intensity is the ratio of carbon emissions to economic activity or some other activity. ... Exercise intensity refers the how much work is being done when exercising. ... This article or section contains a plot summary that may be overly long, confusing, or ambiguous. ... Intensity is a 1997 made for tv horror movie based on the novel by Dean Koontz. ...

See also

• Sound intensity
• Brightness

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