26 / 66

7-12

luminous energy, DEPRECATED: quantity of light

URNurn:iso:std:iso:80000:-7:ed-2:en:item:7-12

https://metanorma.github.io/isq-smart/quantities/part-7/t7-12
urn:iso:std:iso:80000:-7:ed-2:en:item:7-12

ISQ Identifiers

ISO

urn:iso:std:iso:80000:-7:ed-2:en:item:7-12

IEC

urn:iec:std:iec:80000-7:2019:::item:7-12

Designations

ENluminous energy

FRquantité de lumière

ENDEPRECATED: quantity of light

FRDÉCONSEILLÉ: énergie lumineuse

Symbol

Q_{v}

(Q)

Notation systems

Rendered

Q_{v}

Rendered

(Q)

AsciiMath

Q_"v"

AsciiMath

(Q)

LaTeX

Q_{\text{v}}

LaTeX

( Q )

Definition

energy of electromagnetic waves weighted by the spectral luminous efficiency (spectral luminous efficiency <specified photometric condition>) multiplied by maximum luminous efficacy (maximum luminous efficacy <specified photometric condition>) of a specified photometric condition

énergie des ondes électromagnétiques pondérée par le produit de l'efficacité lumineuse relative spectrale (spectral luminous efficiency <specified photometric condition>) par l'efficacité lumineuse maximale (maximum luminous efficacy <specified photometric condition>) d'une condition photométrique spécifiée

Units

l m \cdot s

lumen second

View related quantities →

c d \cdot s r \cdot s

candela steradian second

View related quantities →

Notes

Luminous energy for photopic vision is expressed by

Q_{v} = K_{m} \int_{0}^{\infty} Q_{e, λ} (λ) V (λ) d λ

where $Q_{e, λ} (λ)$ is the spectral radiant energy (spectral radiant energy) at wavelength $λ$ (ISO 80000-3: Space and time), $V (λ)$ is spectral luminous efficiency (spectral luminous efficiency <specified photometric condition>), and $K_{m}$ is maximum luminous efficacy (maximum luminous efficacy <specified photometric condition>).

Luminous energy can be emitted, transferred or received.

Luminous energy can be expressed by the time integral of the luminous flux (luminous flux), $Φ_{v}$ , over a given duration (ISO 80000-3: Space and time), $Δ t$

Q_{v} = \int_{Δ t}^{} Φ_{v} d t

The corresponding radiometric quantity is "radiant energy" (radiant energy <electromagnetism>). The corresponding quantity for photons is "photon energy" (photon energy).

La quantité de lumière en vision photopique est exprimée par

Q_{v} = K_{m} \int_{0}^{\infty} Q_{e, λ} (λ) V (λ) d λ

où $Q_{e, λ} (λ)$ est l'énergie rayonnante spectrique (spectral radiant energy) à la longueur d'onde $λ$ (ISO 80000-3: Space and time), $V (λ)$ est l'efficacité lumineuse relative spectrale (spectral luminous efficiency <specified photometric condition>) et $K_{m}$ est l'efficacité lumineuse maximale (maximum luminous efficacy <specified photometric condition>).

La quantité de lumière peut être émise, transportée ou reçue.

La quantité de lumière peut être exprimée par l'intégrale par rapport au temps du flux lumineux (luminous flux), $Φ_{v}$ , pendant une durée (ISO 80000-3: Space and time), donnée, $Δ t$

Q_{v} = \int_{Δ t}^{} Φ_{v} d t

La grandeur radiométrique correspondante est l'«énergie rayonnante» (radiant energy <electromagnetism>). La grandeur photonique correspondante est l'«énergie photonique» (photon energy).

Referenced by

radiant energy <electromagnetism>luminous flux luminous exposure photon energy

Concept HierarchyPendrill (2024)

T JT J quantitiesLevel 0 · Kind

Broader concepts

◇ T J 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:t7-12

Properties

isq:QuantityShape

Property	Value
rdf:type	isq:Quantity smart:TermEntry
dcterms:identifier	7-12
skosxl:prefLabel	"luminous energy"@en
skosxl:altLabel	"DEPRECATED: quantity of light"@en"Q_"v""@en"(Q)"@en
skos:definition	energy of electromagnetic waves weighted by the spectral luminous efficiency (<<t7-10.2>>) multiplied by maximum luminou…
skos:note	Luminous energy for photopic vision is expressed by [stem%unnumbered] ++++ Q_"v" = K_"m" int_0^(oo) Q_("e",lambda)(lamb…
isq:hasUnit	lms (lumen second)cdsr*s (candela steradian second)
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