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Part 77-30.1

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Part 7: Light and Radiation·66 entries

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Section 7-302 entries

7-30.1emissivity 7-30.2emissivity at a specified wavelength

7-30.1

emissivity

URNurn:iso:std:iso:80000:-7:ed-2:en:item:7-30.1

Download RDF.jsonld .ttl

https://metanorma.github.io/isq-smart/quantities/part-7/t7-30.1
urn:iso:std:iso:80000:-7:ed-2:en:item:7-30.1

ISQ Identifiers

ISO

urn:iso:std:iso:80000:-7:ed-2:en:item:7-30.1

IEC

urn:iec:std:iec:80000-7:2019:::item:7-30.1

Designations

ENemissivity

FRémissivité

Symbol

ε

ε_{T}

Notation systems

Rendered

ε

Rendered

ε_{T}

AsciiMath

epsilon

AsciiMath

epsilon_"T"

LaTeX

\upepsilon

LaTeX

\upepsilon_{\text{T}}

Definition

quotient of the radiant exitance of a radiator and the radiant exitance of a Planckian radiator at the same temperature, expressed by

ε = \frac{M}{M_{b}}

where $M$ is the radiant exitance (radiant exitance) of a thermal radiator and $M_{b}$ is the radiant exitance of a Planckian radiator at the same temperature (ISO 80000-5: Thermodynamics)

quotient de l'exitance énergétique d'un radiateur par l'exitance énergétique d'un radiateur de Planck à la même température, exprimé par

ε = \frac{M}{M_{b}}

où $M$ est l'exitance énergétique (radiant exitance) d'un radiateur thermique et $M_{b}$ est l'exitance énergétique d'un radiateur de Planck à la même température (ISO 80000-5: Thermodynamics)

Units

1

one

View related quantities →

Concept HierarchyPendrill (2024)

1dimensionless quantitiesLevel 0 · Kind

Broader concepts

◇ dimensionless 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:t7-30.1

Properties

isq:QuantityShape

Property	Value
rdf:type	isq:Quantity smart:TermEntry
dcterms:identifier	7-30.1
skosxl:prefLabel	"emissivity"@en
skosxl:altLabel	"epsilon"@en"epsilon_"T""@en
skos:definition	quotient of the radiant exitance of a radiator and the radiant exitance of a Planckian radiator at the same temperature,…
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