quantitykind:PlanckFunction
http://qudt.org/vocab/quantitykind/PlanckFunction
Types:
qudt:QuantityKind| Predicate | Object |
|---|---|
rdf:type |
qudt:QuantityKind |
dcterms:description |
In the ISO System of Quantities, the \(\textit{Planck function}\) is defined by the formula \(Y = -G/T\), where \(G\) is Gibbs energy and \(T\) is thermodynamic temperature. It is a thermodynamic potential divided by temperature (a "free entropy"), expressed in joules per kelvin, and is the Gibbs-energy counterpart of the Massieu function \(J = -A/T\). The same name is also widely used in radiometry for the spectral radiance \(B(T)\) emitted by a black body, given by Planck's law; that is a different quantity, of a different dimension, and is covered by quantitykind:SpectralRadiance. |
qudt:applicableUnit |
unit:J-PER-K |
qudt:hasDimensionVector |
qkdv:A0E0L2I0M1H-1T-2D0 |
qudt:isoNormativeReference |
http://www.iso.org/iso/catalogue_detail?csnumber=31890 |
qudt:latexDefinition |
\(Y = -G/T\), where \(G\) is Gibbs energy and \(T\) is thermodynamic temperature. |
qudt:wikidataMatch |
http://www.wikidata.org/entity/Q76364998 |
rdfs:comment |
“Applicable units are those of quantitykind:PlanckFunction” |
rdfs:isDefinedBy |
http://qudt.org/3.5.0/vocab/quantitykind |
rdfs:label |
“Planck Function”@en |
rdfs:seeAlso |
Generated 2026-07-28T13:52:55.573+00:00