@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:t7-31.4>
  a isq:Entry ;
  rdf:type isq:Quantity ;
  rdf:type smart:TermEntry ;
  dcterms:identifier "7-31.4" ;
  skosxl:prefLabel "luminous reflectance"@en ;
  skosxl:altLabel "rho_\"v\""@en ;
  skos:definition "quotient of reflected luminous flux and incident luminous flux, is expressed by\n\n[stem%unnumbered]\n++++\nrho_\"v\" = (Phi_(\"v,r\"))/(Phi_\"v,m\")\n++++\n\nwhere stem:[Phi_\"v,r\"] is reflected luminous flux (<<t7-13>>) and stem:[Phi_\"v,m\"] is incident luminous flux\n"@en ;
  smart:hasBindingnessType "bindingness-type:normative" ;
  dcterms:isPartOf <isq:part-7> ;
  isq:hasUnit [
    skos:notation "1" ;
    skosxl:prefLabel "one"@en
  ] ;
  skos:note "From spectral reflectance, stem:[rho(lambda)], luminous reflectance can be calculated by\n\n[stem%unnumbered]\n++++\nrho_\"v\" = (int_0^(oo) rho(lambda) Phi_(\"e\",lambda)(lambda)V(lambda)\"d\"lambda)/(int_0^(oo) Phi_(\"e\",lambda)(lambda)V(lambda)\"d\"lambda)\n++++\n\nwhere stem:[Phi_(\"e\",lambda)(lambda)] is spectral radiant flux (or relative spectral distribution) of the source, and stem:[V(lambda)] is spectral luminous efficiency (<<t7-10.2>>).\n\nSee also <<t7-31.3>>.\n"@en ;
  iso:urn <urn:iso:std:iso:80000:-7:ed-2:en:item:7-31.4> .