radiant power

https://doi.org/10.1351/goldbook.R05046
Power emitted, transferred or received as radiation. SI unit is \(\pu{J s-1} = \pu{W}\).
Notes:
  1. Mathematical definition: \(P = \rm{d}Q/\rm{d}t\). If the radiant energy \(Q\) is constant over the time interval, \(P = Q/t\).
  2. In radiometry, flux (\(\varPhi\)) is used with the same units as \(P\). The symbol \(\varPhi\) is reserved for quantum yield in photochemistry. Therefore, the use of flux (\(\varPhi\)) is not recommended.
Source:
PAC, 2007, 79, 293. (Glossary of terms used in photochemistry, 3rd edition (IUPAC Recommendations 2006)) on page 410 [Terms] [Paper]
Citation: 'radiant power' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.R05046 RIS BibTex EndNote
Div. IIIPDFTextXMLJSONQuantity