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radiant flux

 
Dictionary: radiant flux
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n.
The rate of flow of radiant energy.


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WordNet: radiant flux
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Note: click on a word meaning below to see its connections and related words.

The noun has one meaning:

Meaning #1: the rate of flow of radiant energy (electromagnetic waves)

Wikipedia: Radiant flux
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In radiometry, radiant flux or radiant power is the measure of the total power of electromagnetic radiation (including infrared, ultraviolet, and visible light). The power may be the total emitted from a source, or the total landing on a particular surface.

Units

The SI unit of radiant flux is the watt (W), which has dimensions of energy/time or, in SI units joules/second.

See also

[edit]

SI radiometry units
Quantity Symbol SI unit Abbr. Notes
Radiant energy Q joule J energy
Radiant flux Φ watt W radiant energy per unit time, also called radiant power
Radiant intensity I watt per steradian W·sr−1 power per unit solid angle
Radiance L watt per steradian per square metre W·sr−1·m−2 power per unit solid angle per unit projected source area.

called intensity in some other fields of study.
Irradiance E, I watt per square metre W·m−2 power incident on a surface.

sometimes confusingly called "intensity".
Radiant exitance /
Radiant emittance		 M watt per square metre W·m−2 power emitted from a surface.
Radiosity J or Jλ watt per square metre W·m−2 emitted plus reflected power leaving a surface
Spectral radiance Lλ
or
Lν		 watt per steradian per metre3
or

watt per steradian per square
metre per hertz

 W·sr−1·m−3
or

W·sr−1·m−2·Hz−1

 commonly measured in W·sr−1·m−2·nm−1
Spectral irradiance Eλ
or
Eν		 watt per metre3
or
watt per square metre per hertz		 W·m−3
or
W·m−2·Hz−1		 commonly measured in W·m−2·nm−1
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Copyrights:

Dictionary. The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.  Read more
WordNet. WordNet 1.7.1 Copyright © 2001 by Princeton University. All rights reserved.  Read more
Wikipedia. This article is licensed under the Creative Commons Attribution/Share-Alike License. It uses material from the Wikipedia article "Radiant flux".  Read more