@prefix isq: <https://w3id.org/standards/isq/ontologies/core/> .
@prefix smart: <https://example.org/smart-sdu/> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix dcterms: <http://purl.org/dc/terms/> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .

<isq:t7-19.1>
  a isq:Entry ;
  rdf:type isq:Quantity ;
  rdf:type smart:TermEntry ;
  dcterms:identifier "7-19.1" ;
  skosxl:prefLabel "photon number"@en ;
  skosxl:altLabel "number of photons"@en ;
  skosxl:altLabel "N_\"p\""@en ;
  skos:definition "quotient of radiant energy and photon energy, expressed by\n\n[stem%unnumbered]\n++++\nN_\"p\" = (Q_\"e\")/(h nu)\n++++\n\nwhere stem:[Q_\"e\"] is radiant energy (<<t7-2.1>>), stem:[h] is the Planck constant (<<iso80000-1>>), and stem:[nu] is the frequency (<<iso80000-3>>) of the corresponding electromagnetic wave\n"@en ;
  smart:hasBindingnessType "bindingness-type:normative" ;
  dcterms:isPartOf <isq:part-7> ;
  isq:hasUnit [
    skos:notation "1" ;
    skosxl:prefLabel "one"@en
  ] ;
  skos:note "Photon number can also be expressed by the time integral of the photon flux (<<t7-20>>), stem:[Phi_\"p\"], over a given duration, stem:[Delta t],\n\n[stem%unnumbered]\n++++\nN_\"p\" = int_(Delta t)Phi_\"p\" \"d\"t\n++++\n"@en ;
  iso:urn <urn:iso:std:iso:80000:-7:ed-2:en:item:7-19.1> .