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Part 33-26.1

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Part 3: Space and Time·42 entries

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Section 3-263 entries

3-26.1attenuation, extinction 3-26.2phase coefficient 3-26.3propagation coefficient

3-26.1

attenuation, extinction

URNurn:iso:std:iso:80000:-3:ed-2:en:item:3-26.1

Download RDF.jsonld .ttl

https://metanorma.github.io/isq-smart/quantities/part-3/t3-26.1
urn:iso:std:iso:80000:-3:ed-2:en:item:3-26.1

ISQ Identifiers

ISO

urn:iso:std:iso:80000:-3:ed-2:en:item:3-26.1

IEC

urn:iec:std:iec:80000-3:2019:::item:3-26.1

Designations

ENattenuation

FRaffaiblissement linéique

ENextinction

FRextinction

Symbol

α

Notation systems

Rendered

α

AsciiMath

alpha

LaTeX

\alpha

Definition

gradual decrease in magnitude (ISO 80000-2: Mathematics) of any kind of flux through a medium

diminution progressive avec la distance d'une grandeur représentant un flux quelconque à travers un milieu

Units

m^{- 1}

per metre

View related quantities →

Notes

If a quantity is a function of distance (distance) expressed by:

f (x) \propto e^{- α x}

where $x$ denotes distance (distance), then $α$ denotes attenuation.

The inverse of attenuation is called attenuation length.

Si une grandeur est une fonction de la distance (distance) exprimée par:

f (x) \propto e^{- α x}

où $x$ désigne la distance (distance), alors $α$ désigne l'affaiblissement linéique.

L'inverse de l'affaiblissement linéique est appelé longueur d'affaiblissement.

Referenced by

propagation coefficient

Concept HierarchyPendrill (2024)

L⁻¹L⁻¹ quantitiesLevel 0 · Kind

Broader concepts

◇ L⁻¹ 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:t3-26.1

Properties

isq:QuantityShape

Property	Value
rdf:type	isq:Quantity smart:TermEntry
dcterms:identifier	3-26.1
skosxl:prefLabel	"attenuation"@en
skosxl:altLabel	"extinction"@en"alpha"@en
skos:definition	gradual decrease in magnitude (<<iso80000-2>>) of any kind of flux through a medium
skos:note	If a quantity is a function of distance (<<t3-1.8>>) expressed by: [stem%unnumbered] ++++ f(x) prop e^(-alpha x) ++++ …
isq:hasUnit	m^(-1) (per metre)
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