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Part 77-8.2

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Part 7: Light and Radiation·66 entries

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Section 7-82 entries

7-8.1radiant exitance, DEPRECATED: radiant emittance 7-8.2spectral radiant exitance

7-8.2

spectral radiant exitance

URNurn:iso:std:iso:80000:-7:ed-2:en:item:7-8.2

Download RDF.jsonld .ttl

https://metanorma.github.io/isq-smart/quantities/part-7/t7-8.2
urn:iso:std:iso:80000:-7:ed-2:en:item:7-8.2

ISQ Identifiers

ISO

urn:iso:std:iso:80000:-7:ed-2:en:item:7-8.2

IEC

urn:iec:std:iec:80000-7:2019:::item:7-8.2

Designations

ENspectral radiant exitance

FRexitance énergétique spectrique

Symbol

M_{e, λ}

(M_{λ})

Notation systems

Rendered

M_{e, λ}

Rendered

(M_{λ})

AsciiMath

M_("e",lambda)

AsciiMath

(M_(lambda))

LaTeX

M_{\text{e} , \lambda}

LaTeX

( M_{\lambda} )

Definition

density of radiant exitance with respect to wavelength, expressed by

M_{e, λ} = \frac{d M_{e}}{d λ}

where $M_{e}$ is radiant exitance (radiant exitance) in terms of wavelength $λ$ (ISO 80000-3: Space and time)

dérivée de l'exitance énergétique par rapport à la longueur d'onde, exprimée par

M_{e, λ} = \frac{d M_{e}}{d λ}

où $M_{e}$ est l'exitance énergétique (radiant exitance) en fonction de la longueur d'onde $λ$ (ISO 80000-3: Space and time)

Units

\frac{W}{m^{2} \cdot n m}

watt per square metre nanometre

View related quantities →

k g \cdot m^{- 1} \cdot s^{- 3}

kilogram per metre second cubed

View related quantities →

Notes

The integral of (total) radiant exitance is determined by the wavelength interval $(λ_{1}, λ_{2})$ under consideration:

M_{e} = \int_{λ_{1}}^{λ_{2}} M_{e, λ} d λ

L'intégrale de l'exitance énergétique (totale) est déterminée par l'intervalle de longueurs d'onde $(λ_{1}, λ_{2})$ considéré:

M_{e} = \int_{λ_{1}}^{λ_{2}} M_{e, λ} d λ

Referenced by

luminous exitance

Concept HierarchyPendrill (2024)

1dimensionless quantitiesLevel 0 · Kind

Broader concepts

◇ dimensionless quantities

Ontology
isq:Quantity smart:TermEntry

Class Hierarchy

smart:Entity smart:TermEntryisq:Quantity

A physical quantity as defined in ISO/IEC 80000, with associated symbols, definitions, and units of measurement.

Instance IRI

isq:t7-8.2

Properties

isq:QuantityShape

Property	Value
rdf:type	isq:Quantity smart:TermEntry
dcterms:identifier	7-8.2
skosxl:prefLabel	"spectral radiant exitance"@en
skosxl:altLabel	"M_("e",lambda)"@en"(M_(lambda))"@en
skos:definition	density of radiant exitance with respect to wavelength, expressed by [stem%unnumbered] ++++ M_("e",lambda) = ("d"M_"e")…
skos:note	The integral of (total) radiant exitance is determined by the wavelength interval stem:[(lambda_1, lambda_2)] under cons…
isq:hasUnit	W/(m^2nm) (watt per square metre nanometre)kgm^(-1)*s^(-3) (kilogram per metre second cubed)
isq:hasDimension	isq:Dimension
smart:hasBindingnessType	bindingness-type:normative
dcterms:isPartOf	isq:part-7

Related Entities

isq:QuantityShape isq:part-7 isq:Unit isq:Dimension isq:hasDimension smart:TermEntry