In colloquial use

• Strength (disambiguation)
• Amplitude
  Amplitude
  Amplitude is the magnitude of change in the oscillating variable with each oscillation within an oscillating system. For example, sound waves in air are oscillations in atmospheric pressure and their amplitudes are proportional to the change in pressure during one oscillation...
  
  
• Level (disambiguation)
• Magnitude (disambiguation)

Physics

• Intensity (physics)
  Intensity (physics)
  In physics, intensity is a measure of the energy flux, averaged over the period of the wave. The word "intensity" here is not synonymous with "strength", "amplitude", or "level", as it sometimes is in colloquial speech...
  
  , power per unit area (W/m²)
• Field strength
  Field strength
  In physics, the field strength of a field is the magnitude of its vector value.In theoretical physics, field strength is another name for the curvature form...
  
   of electric, magnetic, or electromagnetic fields (V/m, T, etc.)
• Intensity (heat transfer)
  Intensity (heat transfer)
  In the field of heat transfer, intensity of radiation I is a measure of the distribution of radiant heat flux per unit area and solid angle, in a particular direction, defined according todq = I\, d\omega\, \cos \theta\, dAwhere...
  
  , radiant heat flux per unit area per unit solid angle (W·m⁻²·sr⁻¹)

Optics

• Radiant intensity
  Radiant intensity
  In radiometry, radiant intensity is a measure of the intensity of electromagnetic radiation. It is defined as power per unit solid angle. The SI unit of radiant intensity is watts per steradian . Radiant intensity is distinct from irradiance and radiant exitance, which are often called intensity...
  
  , power per unit solid angle (W/sr)
• Luminous intensity
  Luminous intensity
  In photometry, luminous intensity is a measure of the wavelength-weighted power emitted by a light source in a particular direction per unit solid angle, based on the luminosity function, a standardized model of the sensitivity of the human eye...
  
  , luminous flux per unit solid angle (lm/sr or cd)
• Irradiance
  Irradiance
  Irradiance is the power of electromagnetic radiation per unit area incident on a surface. Radiant emittance or radiant exitance is the power per unit area radiated by a surface. The SI units for all of these quantities are watts per square meter , while the cgs units are ergs per square centimeter...
  
  , power per unit area (W/m²)

Astronomy

• Radiance
  Radiance
  Radiance and spectral radiance are radiometric measures that describe the amount of radiation such as light or radiant heat that passes through or is emitted from a particular area, and falls within a given solid angle in a specified direction. They are used to characterize both emission from...
  
  , power per unit solid angle per unit projected source area (W·sr⁻¹·m⁻²)

Seismology

• Mercalli intensity scale
  Mercalli intensity scale
  The Mercalli intensity scale is a seismic scale used for measuring the intensity of an earthquake. It measures the effects of an earthquake, and is distinct from the moment magnitude M_w usually reported for an earthquake , which is a measure of the energy released...
  
  , a measure of earthquake impact
• Japan Meteorological Agency seismic intensity scale
  Japan Meteorological Agency seismic intensity scale
  The Japan Meteorological Agency seismic intensity scale is a seismic scale used in Japan and Taiwan to measure the intensity of earthquakes. It is measured in units of...
  
  , a measure of earthquake impact
• Peak ground acceleration
  Peak ground acceleration
  Peak ground acceleration is a measure of earthquake acceleration on the ground and an important input parameter for earthquake engineering, also known as the design basis earthquake ground motion...
  
  , a measure of earthquake acceleration (g or m/s²)

Other uses

• Value intensity in philosophy and ethics
• In video luminous emittance, the luminous flux per unit area (lm/m² or lux)
• Energy intensity
  Energy intensity
  ]Energy intensity is a measure of the energy efficiency of a nation's economy. It is calculated as units of energy per unit of GDP.* High energy intensities indicate a high price or cost of converting energy into GDP....
  
  , 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
• Floor area ratio
  Floor Area Ratio
  The floor area ratio or floor space index is the ratio of the total floor area of buildings on a certain location to the size of the land of that location, or the limit imposed on such a ratio....
  
  , the ratio of the total floor area of buildings on a certain location to the size of the land of that location, or the zoning limit imposed on such a ratio
• Exercise intensity
  Exercise intensity
  Exercise intensity refers to how much work is being done when exercising. The intensity has an effect on what fuel the body uses and what kind of adaptations the body makes after exercise . Intensity is the amount of physical power, expressed as a percentage of maximum, the body uses in performing...
  
  , a measure of how much work is done during exercise (% of max heart rate)
• Intensity (novel)
  Intensity (novel)
  -Plot summary:Chyna Shepard is a college student visiting the family of her friend, Laura Templeton, for a long weekend. Chyna, who was abused and neglected by her mother as a child, finds the Templeton house provides something she has yearned: acceptance...
  
  , a 1995 novel by Dean Koontz
  • Intensity (film), a 1997 made for TV movie based on the novel
• Intensity (album), a 1960 jazz album by saxophonist Art Pepper
• Intensity!, an album by The Bambi Molesters