TERMIUM Plus®

The Government of Canada’s terminology and linguistic data bank.

RADIANCE [3 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2008-06-05

English

Subject field(s)
  • Electromagnetic Radiation
  • Atmospheric Physics
  • Remote Sensing
DEF

The radiant flux [of energy] per unit area emitted by a body or surface.

OBS

... the term exitance has replaced emittance ...

OBS

exitance: term officially approved by the RADARSAT-2 Terminology Approval Group (RTAG).

PHR

Thermal emittance.

French

Domaine(s)
  • Rayonnements électromagnétiques
  • Physique de l'atmosphère
  • Télédétection
DEF

Flux énergétique global émis par unité de surface d'une source.

OBS

Ce flux s'exprime en W.m-2 pour l'exitance énergétique ou en lm.m-2 (lumens par mètre carré) pour l'exitance lumineuse. On l'appelait autrefois radiance.

OBS

exitance : terme uniformisé par le Groupe de travail de la terminologie de RADARSAT-2 (GTTR).

PHR

Émittance monochromatique, spectrale, thermique.

Spanish

Campo(s) temático(s)
  • Radiación electromagnética
  • Física de la atmósfera
  • Teledetección
Save record 1

Record 2 2005-07-08

English

Subject field(s)
  • Electromagnetic Radiation
  • Atmospheric Physics
  • Space Physics
DEF

... a measure of radiometric flux density per unit solid angle.

OBS

Unlike irradiance, radiance is a property solely of a radiation field, not of the orientation of the surface. ... In general, radiance depends on time, position, and direction as well as frequency (monochromatic or spectral radiance) or range of frequencies.

OBS

Do not confuse "radiance" with "luminance" which is the photometric equivalent of radiance and is expressed in candelas per square meter (cd/m²).

OBS

Standard units of radiance are watts per square meter and steradian: W . m-2. sr-1 or W/(m².sr).

OBS

radiance: term officially approved by the RADARSAT-2 Terminoology Approval Group (RTAG).

French

Domaine(s)
  • Rayonnements électromagnétiques
  • Physique de l'atmosphère
  • Physique spatiale
DEF

Flux énergétique émis par unité de surface de la source, par unité d'angle solide, dans une direction donnée.

OBS

Unités SI de la «luminance énergétique» : watt par mètre carré par stéradian; W . m[indice-²] . sr-1 ou W/(sr.m²).

OBS

luminance : terme uniformisé par le Groupe de travail de la terminologie de RADARSAT-2 (GTTR).

Spanish

Campo(s) temático(s)
  • Radiación electromagnética
  • Física de la atmósfera
  • Física espacial
DEF

[...] flujo luminoso que la [superficie luminosa] emite por unidad de superficie, expresado en lux o en fots.

Save record 2

Record 3 1995-07-19

English

Subject field(s)
  • General Scientific and Technical Vocabulary
  • Aeroindustry
OBS

Term standardized by ISO.

French

Domaine(s)
  • Vocabulaire technique et scientifique général
  • Constructions aéronautiques
OBS

Terme normalisé par l'ISO.

Spanish

Save record 3

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