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Part 77-2.2

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Part 7: Light and Radiation·66 entries

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Section 7-22 entries

7-2.1radiant energy <electromagnetism>7-2.2spectral radiant energy

7-2.2

spectral radiant energy

URNurn:iso:std:iso:80000:-7:ed-2:en:item:7-2.2

Download RDF.jsonld .ttl

https://metanorma.github.io/isq-smart/quantities/part-7/t7-2.2
urn:iso:std:iso:80000:-7:ed-2:en:item:7-2.2

ISQ Identifiers

ISO

urn:iso:std:iso:80000:-7:ed-2:en:item:7-2.2

IEC

urn:iec:std:iec:80000-7:2019:::item:7-2.2

Designations

ENspectral radiant energy

FRénergie rayonnante spectrique

Symbol

Q_{e, λ}

W_{λ}

U_{λ}

(Q_{λ})

Notation systems

Rendered

Q_{e, λ}

Rendered

W_{λ}

Rendered

U_{λ}

Rendered

(Q_{λ})

AsciiMath

Q_("e",lambda)

AsciiMath

W_lambda

AsciiMath

U_lambda

AsciiMath

(Q_lambda)

LaTeX

Q_{\text{e} , \lambda}

LaTeX

W_{\lambda}

LaTeX

U_{\lambda}

LaTeX

( Q_{\lambda} )

Definition

spectral density of radiant energy, expressed by

Q_{e, λ} = \frac{d Q_{e}}{d λ}

where $Q_{e}$ is radiant energy (radiant energy <electromagnetism>) in terms of wavelength $λ$ (ISO 80000-3: Space and time)

densité spectrale de l'énergie rayonnante, exprimée par

Q_{e, λ} = \frac{d Q_{e}}{d λ}

où $Q_{e}$ est l'énergie rayonnante (radiant energy <electromagnetism>) en fonction de la longueur d'onde $λ$ (ISO 80000-3: Space and time)

Units

\frac{J}{n} m

joule per nanometre

View related quantities →

k g \cdot m \cdot s^{- 2}

kilogram metre per second squared

View related quantities →

Notes

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

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

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

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

Referenced by

luminous energy

Concept HierarchyPendrill (2024)

L² M T⁻²energy-type quantitiesLevel 0 · Kind

Broader concepts

◇ energy-type 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:t7-2.2

Properties

isq:QuantityShape

Property	Value
rdf:type	isq:Quantity smart:TermEntry
dcterms:identifier	7-2.2
skosxl:prefLabel	"spectral radiant energy"@en
skosxl:altLabel	"Q_("e",lambda)"@en"W_lambda"@en"U_lambda"@en"(Q_lambda)"@en
skos:definition	spectral density of radiant energy, expressed by [stem%unnumbered] ++++ Q_("e",lambda) = ("d"Q_"e")/("d"lambda) ++++ w…
skos:note	The integral of (total) radiant energy is determined by the wavelength interval stem:[(lambda_1, lambda_2)] under consid…
isq:hasUnit	J/nm (joule per nanometre)kgms^(-2) (kilogram metre per second squared)
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

Definition

Units

Notes

Referenced by

Broader concepts

Ontology isq:Quantitysmart:TermEntry

Class Hierarchy

Instance IRI

Properties

Related Entities

Ontology
isq:Quantity smart:TermEntry