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Part 77-4.1

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Part 7: Light and Radiation·66 entries

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Section 7-42 entries

7-4.1radiant flux, radiant power 7-4.2spectral radiant flux, spectral radiant power

7-4.1

radiant flux, radiant power

URNurn:iso:std:iso:80000:-7:ed-2:en:item:7-4.1

Download RDF.jsonld .ttl

https://metanorma.github.io/isq-smart/quantities/part-7/t7-4.1
urn:iso:std:iso:80000:-7:ed-2:en:item:7-4.1

ISQ Identifiers

ISO

urn:iso:std:iso:80000:-7:ed-2:en:item:7-4.1

IEC

urn:iec:std:iec:80000-7:2019:::item:7-4.1

Designations

ENradiant flux

FRflux énergétique

ENradiant power

FRpuissance rayonnante

Symbol

Φ_{e}

P_{e}

(Φ, P)

Notation systems

Rendered

Φ_{e}

Rendered

P_{e}

Rendered

(Φ, P)

AsciiMath

Phi_"e"

AsciiMath

P_"e"

AsciiMath

(Phi, P)

LaTeX

\Phi_{\text{e}}

LaTeX

P_{\text{e}}

LaTeX

( \Phi , P )

Definition

change in radiant energy with time, expressed by

Φ_{e} = \frac{d Q_{e}}{d t}

where $Q_{e}$ is the radiant energy (radiant energy <electromagnetism>) emitted, transferred or received and $t$ is time (ISO 80000-3: Space and time)

variation de l'énergie rayonnante dans le temps, exprimée par

Φ_{e} = \frac{d Q_{e}}{d t}

où $Q_{e}$ est l'énergie rayonnante (radiant energy <electromagnetism>) émise, transportée ou reçue et $t$ est le temps (ISO 80000-3: Space and time)

Units

W

watt

View related quantities →

k g \cdot m^{2} \cdot s^{- 3}

kilogram square metre per second cubed

View related quantities →

Notes

The corresponding photometric quantity is "luminous flux" (luminous flux). The corresponding quantity for photons is "photon flux" (photon flux).

La grandeur photométrique correspondante est le «flux lumineux» (luminous flux). La grandeur photonique correspondante est le «flux photonique» (photon flux).

Referenced by

radiant energy <electromagnetism>spectral radiant flux radiant intensity irradiance radiant exitance luminous efficiency <specified photometric condition>spectral luminous efficiency <specified photometric condition>luminous efficacy of radiation <specified photometric condition>luminous flux photon flux absorptance reflectance transmittance reflectance factor linear absorption coefficient <radiometry>

Concept HierarchyPendrill (2024)

L² M T⁻³power-type quantitiesLevel 0 · Kind

Broader concepts

◇ power-type quantities

Characterizes

● photon

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:t7-4.1

Properties

isq:QuantityShape

Property	Value
rdf:type	isq:Quantity smart:TermEntry
dcterms:identifier	7-4.1
skosxl:prefLabel	"radiant flux"@en
skosxl:altLabel	"radiant power"@en"Phi_"e""@en"P_"e""@en"(Phi, P)"@en
skos:definition	change in radiant energy with time, expressed by [stem%unnumbered] ++++ Phi_"e" = ("d"Q_"e")/("d"t) ++++ where stem:[Q…
skos:note	The corresponding photometric quantity is "luminous flux" (<<t7-13>>). The corresponding quantity for photons is "photon…
isq:hasUnit	W (watt)kgm^2s^(-3) (kilogram square metre per 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

Definition

Units

Notes

Referenced by

Broader concepts

Characterizes

Ontology isq:Quantitysmart:TermEntry

Class Hierarchy

Instance IRI

Properties

Related Entities

Ontology
isq:Quantity smart:TermEntry