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Section 6-352 entries

6-35.1phase speed of electromagnetic waves 6-35.2speed of light in vacuum, light speed in vacuum, luminal speed

6-35.2

speed of light in vacuum, light speed in vacuum, luminal speed

URNurn:iec:std:iec:80000-6:2022-11:::6-35.2

https://metanorma.github.io/isq-smart/quantities/part-6/t6-35.2
urn:iec:std:iec:80000-6:2022-11:::6-35.2

ISQ Identifiers

ISO

urn:iso:std:iso:80000:-6:ed-1:en:item:6-35.2

IEC

urn:iec:std:iec:80000-6:2022-11:::item:6-35.2

Designations

ENspeed of light in vacuum

FRvitesse de la lumière dans le vide

ENlight speed in vacuum

FRvitesse de la lumière

ENluminal speed

FRvitesse de la lumière

Symbol

c_{0}

Notation systems

Rendered

c_{0}

AsciiMath

c_0

LaTeX

c_{0}

Definition

scalar quantity equal to the speed of electromagnetic waves in vacuum (ISO 80000-1)

c_{0} = 299792458 unitsml(m/s)

grandeur scalaire égale à la vitesse des ondes électromagnétiques dans le vide (ISO 80000-1)

c_{0} = 299792458 unitsml(m/s)

Units

\frac{m}{s}

metre per second

View related quantities →

m \cdot s^{-} 1

metre per second

View related quantities →

Notes

This value is not only valid for electromagnetic waves in vacuum, but also for gravitational waves. It is also the upper limit for the speed of propagation of information since this requires a physical carrier. This quantity is considered to be constant in time.

Its value has been fixed by CGMP (see bipm-si).

See also IEC 60050-113,locality:item="113-01-34".

Cette valeur n'est pas valable que pour les ondes électromagnétiques dans le vide, mais également pour les ondes gravitationnelles. Elle constitue également la limite supérieure de la vitesse de diffusion de l'information puisque ce paramètre exige un support physique. Cette grandeur est considérée comme étant constante dans le temps.

Sa valeur a été établie par la CGMP (voir la bipm-si).

Voir aussi l'IEC 60050-113,droploc%locality:item="113-01-34".

Referenced by

electric constant

Concept HierarchyPendrill (2024)

L T⁻¹velocity-type quantitiesLevel 0 · Kind

Broader concepts

◇ velocity-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:t6-35.2

Properties

isq:QuantityShape

Property	Value
rdf:type	isq:Quantity smart:TermEntry
dcterms:identifier	6-35.2
skosxl:prefLabel	"speed of light in vacuum"@en
skosxl:altLabel	"light speed in vacuum"@en"luminal speed"@en"c_0"@en
skos:definition	scalar quantity equal to the speed of electromagnetic waves in vacuum (<<iso80000-1>>) [stem%unnumbered] ++++ c_0 = 299…
skos:note	This value is not only valid for electromagnetic waves in vacuum, but also for gravitational waves. It is also the upper…
isq:hasUnit	m/s (metre per second)m*s^-1 (metre per second)
isq:hasDimension	isq:Dimension
smart:hasBindingnessType	bindingness-type:normative
dcterms:isPartOf	isq:part-6

Related Entities

isq:QuantityShape isq:part-6 isq:Unit isq:Dimension isq:hasDimension smart:TermEntry