Area Lighting / Radiation, quantities and units IEV ref 845-01-26 Symbol ΦpΦ en photon flux quotient of the number of photons dNp emitted, transmitted, or received in an element of time dt, by that element ${\Phi }_{\text{p}}=\frac{\text{d}{N}_{\text{p}}}{\text{d}t}$ unit: s- 1 Note – For a beam of radiation whose spectral distribution is $\frac{\text{d}{\Phi }_{\text{e}}\left(\lambda \right)}{\text{d}\lambda }$ or $\frac{\text{d}{\Phi }_{\text{e}}\left(v\right)}{\text{d}v}$ the photon flux Φp is ${\Phi }_{\text{p}}={\int }_{0}^{\infty }\frac{\text{d}{\Phi }_{\text{e}}\left(\lambda \right)}{\text{d}\lambda }\cdot \frac{\lambda }{h{c}_{0}}\text{d}\lambda ={\int }_{0}^{\infty }\frac{\text{d}{\Phi }_{\text{e}}\left(v\right)}{\text{d}v}\cdot \frac{1}{hv}\text{d}v$ h, Planck's constant= (6,626 0755 ± 0,000 0040) × 10−34 J • s c0, speed of light in vacuum = 299 792 458 m • s−1. fr flux photonique, m quotient du nombre de photons dNp émis, transmis ou reçus dans un élément de temps dt, par cet élément ${\Phi }_{\text{p}}=\frac{\text{d}{N}_{\text{p}}}{\text{d}t}$ unité: s-1 Note – Pour un faisceau de rayonnement dont la répartition spectrale est $\frac{\text{d}{\Phi }_{\text{e}}\left(\lambda \right)}{\text{d}\lambda }$ ou $\frac{\text{d}{\Phi }_{\text{e}}\left(v\right)}{\text{d}v}$, le flux photonique Φp est ${\Phi }_{\text{p}}={\int }_{0}^{\infty }\frac{\text{d}{\Phi }_{\text{e}}\left(\lambda \right)}{\text{d}\lambda }\cdot \frac{\lambda }{h{c}_{0}}\text{d}\lambda ={\int }_{0}^{\infty }\frac{\text{d}{\Phi }_{\text{e}}\left(v\right)}{\text{d}v}\cdot \frac{1}{hv}\text{d}v$ h, constante de Planck = (6,626 0755 ± 0,000 0040) × 10−34 J • s c0, vitesse de la lumière dans le vide = 299 792 458 m • s−1. ar دفق فوتوني de Photonenstrom, m es flujo fotónico fi fotonivirta it flusso fotonico ko 광자속 ja 光子流 no nb fotonfluks nn fotonfluks pl strumień fotonowy pt fluxo fotónico sr флукс фотона , м јд sv fotonflöde