Energy carried by electromagnetic or gravitational radiation
Not to be confused with Thermal radiation.
Visible light such as sunlight carries radiant energy, which is used in solar power generation.
In physics, and in particular as measured by radiometry, radiant energy is the energy of electromagnetic[1] and gravitational radiation. As energy, its SI unit is the joule (J). The quantity of radiant energy may be calculated by integrating radiant flux (or power) with respect to time. The symbol Qe is often used throughout literature to denote radiant energy ("e" for "energetic", to avoid confusion with photometric quantities). In branches of physics other than radiometry, electromagnetic energy is referred to using E or W. The term is used particularly when electromagnetic radiation is emitted by a source into the surrounding environment. This radiation may be visible or invisible to the human eye.[2][3]
^"Radiant energy". Federal standard 1037C
^George Frederick Barker, Physics: Advanced Course, page 367
^Hardis, Jonathan E., "Visibility of Radiant Energy". PDF.
radiantenergy is the energy of electromagnetic and gravitational radiation. As energy, its SI unit is the joule (J). The quantity of radiantenergy may...
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associated with chemical reactions, the radiantenergy carried by electromagnetic radiation, and the internal energy contained within a thermodynamic system...
Alternative symbols sometimes seen: W or E for radiantenergy, P or F for radiant flux, I for irradiance, W for radiant exitance. Spectral quantities given per...
using the principles of radiant heat to transfer radiantenergy from an emitting heat source to an object. Designs with radiant heating are seen as replacements...
Alternative symbols sometimes seen: W or E for radiantenergy, P or F for radiant flux, I for irradiance, W for radiant exitance. Spectral quantities given per...
radiometry, radiant intensity is the radiant flux emitted, reflected, transmitted or received, per unit solid angle, and spectral intensity is the radiant intensity...
Alternative symbols sometimes seen: W or E for radiantenergy, P or F for radiant flux, I for irradiance, W for radiant exitance. Spectral quantities given per...
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forms of energy, for example, kinetic energy, potential energy, and electromagnetic radiantenergy. When this happens, as recognized in twentieth-century...
Alternative symbols sometimes seen: W or E for radiantenergy, P or F for radiant flux, I for irradiance, W for radiant exitance. Spectral quantities given per...
A radiant barrier is a type of building material that reflects thermal radiation and reduces heat transfer. Because thermal energy is also transferred...
transmittance of the surface of a material is its effectiveness in transmitting radiantenergy. It is the fraction of incident electromagnetic power that is transmitted...
Nuclear potential energyRadiantenergy – (≥0), energy of electromagnetic radiation including light and of gravitational radiation Rest energy – (≥0) given...
Alternative symbols sometimes seen: W or E for radiantenergy, P or F for radiant flux, I for irradiance, W for radiant exitance. Spectral quantities given per...
reflectance of the surface of a material is its effectiveness in reflecting radiantenergy. It is the fraction of incident electromagnetic power that is reflected...
to more active types of energy such as kinetic or radiantenergy) by a triggering mechanism. A direct transformation of energy occurs when hydrogen produced...
process: plants absorb radiantenergy from the sun and use it in an endothermic, otherwise non-spontaneous process. The chemical energy stored can be freed...
is often integrated over a given time period in order to report the radiantenergy emitted into the surrounding environment (joule per square metre, J/m2)...
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