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Section 7-192 entries

7-19.1photon number, number of photons 7-19.2photon energy

7-19.1

photon number, number of photons

URNurn:iso:std:iso:80000:-7:ed-2:en:item:7-19.1

https://metanorma.github.io/isq-smart/quantities/part-7/t7-19.1
urn:iso:std:iso:80000:-7:ed-2:en:item:7-19.1

ISQ Identifiers

ISO

urn:iso:std:iso:80000:-7:ed-2:en:item:7-19.1

IEC

urn:iec:std:iec:80000-7:2019:::item:7-19.1

Designations

ENphoton number

FRnombre de photons

ENnumber of photons

FRnombre de photons

Symbol

N_{p}

Notation systems

Rendered

N_{p}

AsciiMath

N_"p"

LaTeX

N_{\text{p}}

Definition

quotient of radiant energy and photon energy, expressed by

N_{p} = \frac{Q_{e}}{h ν}

where $Q_{e}$ is radiant energy (radiant energy <electromagnetism>), $h$ is the Planck constant (ISO 80000-1), and $ν$ is the frequency (ISO 80000-3: Space and time) of the corresponding electromagnetic wave

quotient de l'énergie rayonnante par l'énergie photonique, exprimée par

N_{p} = \frac{Q_{e}}{h ν}

où $Q_{e}$ est l'énergie rayonnante (radiant energy <electromagnetism>), $h$ est la constante de Planck (ISO 80000-1), et $ν$ est la fréquence (ISO 80000-3: Space and time) de l'onde électromagnétique correspondante

Units

1

one

View related quantities →

Notes

Photon number can also be expressed by the time integral of the photon flux (photon flux), $Φ_{p}$ , over a given duration, $Δ t$ ,

N_{p} = \int_{Δ t}^{} Φ_{p} d t

Le nombre de photons peut également être exprimé par l'intégrale par rapport au temps du flux photonique (photon flux), $Φ_{p}$ , pendant une durée donnée, $Δ t$ ,

N_{p} = \int_{Δ t}^{} Φ_{p} d t

Referenced by

photon energy photon flux photon exposure

Concept HierarchyPendrill (2024)

1dimensionless quantitiesLevel 0 · Kind

Broader concepts

◇ dimensionless quantities

Characterizes

● photon● wave

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:t7-19.1

Properties

isq:QuantityShape

Property	Value
rdf:type	isq:Quantity smart:TermEntry
dcterms:identifier	7-19.1
skosxl:prefLabel	"photon number"@en
skosxl:altLabel	"number of photons"@en"N_"p""@en
skos:definition	quotient of radiant energy and photon energy, expressed by [stem%unnumbered] ++++ N_"p" = (Q_"e")/(h nu) ++++ where st…
skos:note	Photon number can also be expressed by the time integral of the photon flux (<<t7-20>>), stem:[Phi_"p"], over a given du…
isq:hasUnit	1 (one)
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