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Part 33-23.2

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Part 3: Space and Time·42 entries

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Section 3-232 entries

3-23.1phase velocity, phase speed 3-23.2group velocity, group speed

3-23.2

group velocity, group speed

URNurn:iso:std:iso:80000:-3:ed-2:en:item:3-23.2

Download RDF.jsonld .ttl

https://metanorma.github.io/isq-smart/quantities/part-3/t3-23.2
urn:iso:std:iso:80000:-3:ed-2:en:item:3-23.2

ISQ Identifiers

ISO

urn:iso:std:iso:80000:-3:ed-2:en:item:3-23.2

IEC

urn:iec:std:iec:80000-3:2019:::item:3-23.2

Designations

ENgroup velocity

FRvitesse de groupe

ENgroup speed

FRvitesse de groupe

Symbol

c_{g}, v_{g}, (v_{g})

Notation systems

Rendered

c_{g}, v_{g}, (v_{g})

AsciiMath

c_"g", ii(sf(v))_"g", (v_"g")

LaTeX

c_{\text{g}} , \mathit{\mathsf{v}}_{\text{g}} , ( v_{\text{g}} )

Definition

speed with which the envelope of a wave propagates in space

vitesse à laquelle l'enveloppe d'une onde se propage dans l'espace

Units

m \cdot s^{-} 1

metre per second

View related quantities →

Notes

The group velocity is given by:

c_{g} = \frac{d ω}{d k}

where $ω$ denotes the angular frequency (angular frequency) and $k$ the angular repetency (angular repetency).

La vitesse de groupe est donnée par:

c_{g} = \frac{d ω}{d k}

où $ω$ désigne la pulsation (angular frequency) et $k$ la répétance angulaire (angular repetency).

Concept HierarchyPendrill (2024)

L T⁻¹velocity-type quantitiesLevel 0 · Kind

Broader concepts

◇ velocity-type quantities

Characterizes

● 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:t3-23.2

Properties

isq:QuantityShape

Property	Value
rdf:type	isq:Quantity smart:TermEntry
dcterms:identifier	3-23.2
skosxl:prefLabel	"group velocity"@en
skosxl:altLabel	"group speed"@en"c_"g", ii(sf(v))_"g", (v_"g")"@en
skos:definition	speed with which the envelope of a wave propagates in space
skos:note	The group velocity is given by: [stem%unnumbered] ++++ c_"g" = ("d"omega)/("d"k) ++++ where stem:[omega] denotes the a…
isq:hasUnit	m*s^-1 (metre per second)
isq:hasDimension	isq:Dimension
smart:hasBindingnessType	bindingness-type:normative
dcterms:isPartOf	isq:part-3

Related Entities

isq:QuantityShape isq:part-3 isq:Unit isq:Dimension isq:hasDimension smart:TermEntry