@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:t7-31.1>
  a isq:Entry ;
  rdf:type isq:Quantity ;
  rdf:type smart:TermEntry ;
  dcterms:identifier "7-31.1" ;
  skosxl:prefLabel "absorptance"@en ;
  skosxl:altLabel "alpha"@en ;
  skosxl:altLabel "a"@en ;
  skos:definition "quotient of absorbed radiant flux and incident radiant flux, expressed by\n\n[stem%unnumbered]\n++++\nalpha = Phi_\"a\"/Phi_\"m\"\n++++\n\nwhere stem:[Phi_\"a\"] is absorbed radiant flux (<<t7-4.1>>) and stem:[Phi_\"m\"] is incident radiant flux\n"@en ;
  smart:hasBindingnessType "bindingness-type:normative" ;
  dcterms:isPartOf <isq:part-7> ;
  isq:hasUnit [
    skos:notation "1" ;
    skosxl:prefLabel "one"@en
  ] ;
  skos:note "This quantity is also defined spectrally in terms of wavelength, in which case \"spectral\" is added before the quantity name.\n\nDue to energy conservation, stem:[alpha + rho + tau = 1] except when polarized radiation is observed, where stem:[rho] is reflectance (<<t7-31.3>>) and stem:[tau] is transmittance (<<t7-31.5>>).\n"@en ;
  iso:urn <urn:iso:std:iso:80000:-7:ed-2:en:item:7-31.1> .