About: Planck Function

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An Entity of Type : http://qudt.org/schema/qudt/QuantityKind, within Data Space : foodie-cloud.org, foodie-cloud.org associated with source document(s)

Attributes	Values
type	Quantity Kind
label	Planck Function (en)
isDefinedBy	QUDT Quantity Kind Vocabulary Version 2.1.29
seeAlso	Massieu Function Specific Energy Specific Enthalpy Specific Gibbs Energy Specific Helmholtz Energy Specific Internal Energy
Description	The \(\textit{Planck function}\) is used to compute the radiance emitted from objects that radiate like a perfect "Black Body". The inverse of the \(\textit{Planck Function}\) is used to find the \(\textit{Brightness Temperature}\) of an object. The precise formula for the Planck Function depends on whether the radiance is determined on a \(\textit{per unit wavelength}\) or a \(\textit{per unit frequency}\). In the ISO System of Quantities, \(\textit{Planck Function}\) is defined by the formula: \(Y = -G/T\), where \(G\) is Gibbs Energy and \(T\) is thermodynamic temperature. (http://qudt.org/schema/qudt/LatexString)
http://qudt.org/schema/qudt/expression	\(B_{\nu}(T)\) (http://qudt.org/schema/qudt/LatexString)
http://qudt.org/sc...asDimensionVector	http://qudt.org/vocab/dimensionvector/A0E0L2I0M1H0T-2D0
http://qudt.org/sc...ormativeReference	http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19680008986_1968008986.pdf http://pds-atmospheres.nmsu.edu/education_and_outreach/encyclopedia/planck_function.htm http://www.star.nesdis.noaa.gov/smcd/spb/calibration/planck.html
http://qudt.org/sc...ormativeReference	http://www.iso.org/iso/catalogue_detail?csnumber=31890
http://qudt.org/sc...t/latexDefinition	The Planck function, \(B_{\tilde{\nu}}(T)\), is given by: \(B_{\nu}(T) = \frac{2h c^2\tilde{\nu}^3}{e^{hc / k \tilde{\nu} T}-1}\) where, \(\tilde{\nu}\) is wavelength, \(h\) is Planck's Constant, \(k\) is Boltzman's Constant, \(c\) is the speed of light in a vacuum, \(T\) is thermodynamic temperature. (http://qudt.org/schema/qudt/LatexString)
is seeAlso of	Massieu Function Specific Energy Specific Enthalpy Specific Gibbs Energy Specific Helmholtz Energy Specific Internal Energy

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