photon number, Np

https://doi.org/10.1351/goldbook.PT07459
Total number of photons calculated as Np=npNA with Np the amount of photons in einsteins and NA the Avogadro constant.
Note: Mathematical definition: Np=Q/hν for monochromatic radiation of frequency ν, with Q the radiant energy.
Source:
PAC, 2007, 79, 293. (Glossary of terms used in photochemistry, 3rd edition (IUPAC Recommendations 2006)) on page 396 [Terms] [Paper]
Citation: 'photon number' 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.PT07459 RIS BibTex EndNote
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