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Area Lighting / Emission, optical properties of materials

IEV ref 845-24-009

Symbol
ε
εh

en
emissivity
hemispherical emissivity
quotient of the radiant exitance of a radiator, Me, and the radiant exitance of a Planckian radiator at the same temperature, Mb

ε= M e M b MathType@MTEF@5@5@+= feaagKart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbdfwBIj xAHbqedmvETj2BSbqefm0B1jxALjhiov2DaerbuLwBLnhiov2DGi1B TfMBaebbnrfifHhDYfgasaacH8WjY=vipgYlh9vqqj=hEeeu0xXdbb a9frFj0=OqFfea0dXdd9vqai=hGuQ8kuc9pgc9q8qqaq=dir=f0=yq aiVgFr0xfr=xfr=xb9adbaqaaeGaciGaaiaabeqaamaaeaqbaaGcba aeaaaaaaaaa8qacqaH1oqzcqGH9aqpdaWcaaWdaeaapeGaamyta8aa daWgaaWcbaWdbiaabwgaa8aabeaaaOqaa8qacaWGnbWdamaaBaaale aapeGaaeOyaaWdaeqaaaaaaaa@3FD0@

Note 1 to entry: The emissivity has unit one.

Note 2 to entry: This entry was numbered 845-04-09 in IEC 60050-845:1987.


fr
émissivité, f
émissivité hémisphérique, f
quotient de l'exitance énergétique d'un radiateur, Me, par l'exitance énergétique d'un radiateur de Planck à la même température, Mb

ε= M e M b MathType@MTEF@5@5@+= feaagKart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbdfwBIj xAHbqedmvETj2BSbqefm0B1jxALjhiov2DaerbuLwBLnhiov2DGi1B TfMBaebbnrfifHhDYfgasaacH8WjY=vipgYlh9vqqj=hEeeu0xXdbb a9frFj0=OqFfea0dXdd9vqai=hGuQ8kuc9pgc9q8qqaq=dir=f0=yq aiVgFr0xfr=xfr=xb9adbaqaaeGaciGaaiaabeqaamaaeaqbaaGcba aeaaaaaaaaa8qacqaH1oqzcqGH9aqpdaWcaaWdaeaapeGaamyta8aa daWgaaWcbaWdbiaabwgaa8aabeaaaOqaa8qacaWGnbWdamaaBaaale aapeGaaeOyaaWdaeqaaaaaaaa@3FD0@

Note 1 à l'article: L'unité d'émissivité est un.

Note 2 à l'article: Cet article était numéroté 845-04-09 dans l'IEC 60050-845:1987.


ar
قدرة إبتعاثية شبه كروية

cs
emisivita
polokulová emisivita

de
halbräumlicher Emissionsgrad, m

it
emissività

ko
방사율

ja
放射率, <熱放射体の,半球>

nl
nl emissiefactor
hemisferische emissiefactor

nl
be emissiefactor, m
hemisferische emissiefactor, m

pl
emisyjność, f

pt
emissividade
emissividade hemisférica

zh
半球发射率
发射率

Publication date: 2020-12
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