View source for Template:Radiometry coefficients

{|class="wikitable" style="margin:1em auto 1em auto;"
|+ {{navbar-header |1={{#if:{{{1|}}}|Table&nbsp;{{{1}}}.&nbsp;}}Radiometry coefficients|2=Radiometry coefficients}}
|-
! colspan="2" | Quantity
! rowspan="2" | SI units
! rowspan="2" | Notes
|-
! Name
! {{abbr|Sym.|Symbol}}
|-
| style="background: #FFF5F5" | [[Emissivity|Hemispherical emissivity]]
| {{mvar|ε}}
| {{n/a}}
| Radiant exitance of a ''surface'', divided by that of a ''black body'' at the same temperature as that surface.
|-
| style="background: #FFF5F5" | [[Emissivity|Spectral hemispherical emissivity]]
| {{mvar|ε<sub>ν</sub>}} <br /> {{mvar|ε<sub>λ</sub>}}
| {{n/a}}
| Spectral exitance of a ''surface'', divided by that of a ''black body'' at the same temperature as that surface.
|-
| style="background: #FFF5F5" | [[Emissivity|Directional emissivity]]
| {{math|''ε''<sub>Ω</sub>}}
| {{n/a}}
| Radiance ''emitted'' by a ''surface'', divided by that emitted by a ''black body'' at the same temperature as that surface.
|-
| style="background: #FFF5F5" | [[Emissivity|Spectral directional emissivity]]
| {{math|''ε''<sub>Ω,''ν''</sub>}}<br /> {{math|''ε''<sub>Ω,''λ''</sub>}}
| {{n/a}}
| Spectral radiance ''emitted'' by a ''surface'', divided by that of a ''black body'' at the same temperature as that surface.
|-
| style="background: #FDFFF5" | [[Absorptance|Hemispherical absorptance]]
| {{mvar|A}}
| {{n/a}}
| Radiant flux ''absorbed'' by a ''surface'', divided by that received by that surface. This should not be confused with "[[absorbance]]".
|-
| style="background: #FDFFF5" | [[Absorptance|Spectral hemispherical absorptance]]
| {{mvar|A<sub>ν</sub>}}<br />{{mvar|A<sub>λ</sub>}}
| {{n/a}}
| Spectral flux ''absorbed'' by a ''surface'', divided by that received by that surface. This should not be confused with "[[Absorbance|spectral absorbance]]".
|-
| style="background: #FDFFF5" | [[Absorptance|Directional absorptance]]
| {{math|''A''<sub>Ω</sub>}}
| {{n/a}}
| Radiance ''absorbed'' by a ''surface'', divided by the radiance incident onto that surface. This should not be confused with "[[absorbance]]".
|-
| style="background: #FDFFF5" | [[Absorptance|Spectral directional absorptance]]
| {{math|''A''<sub>Ω,''ν''</sub>}}<br /> {{math|''A''<sub>Ω,''λ''</sub>}}
| {{n/a}}
| Spectral radiance ''absorbed'' by a ''surface'', divided by the spectral radiance incident onto that surface. This should not be confused with "[[Absorbance|spectral absorbance]]".
|-
| style="background: #F5FFF8" | [[Reflectance|Hemispherical reflectance]]
| {{mvar|R}}
| {{n/a}}
| Radiant flux ''reflected'' by a ''surface'', divided by that received by that surface.
|-
| style="background: #F5FFF8" | [[Reflectance|Spectral hemispherical reflectance]]
| {{mvar|R<sub>ν</sub>}}<br />{{mvar|R<sub>λ</sub>}}
| {{n/a}}
| Spectral flux ''reflected'' by a ''surface'', divided by that received by that surface.
|-
| style="background: #F5FFF8" | [[Reflectance|Directional reflectance]]
| {{math|''R''<sub>Ω</sub>}}
| {{n/a}}
| Radiance ''reflected'' by a ''surface'', divided by that received by that surface.
|-
| style="background: #F5FFF8" | [[Reflectance|Spectral directional reflectance]]
| {{math|''R''<sub>Ω,''ν''</sub>}}<br />{{math|''R''<sub>Ω,''λ''</sub>}}
| {{n/a}}
| Spectral radiance ''reflected'' by a ''surface'', divided by that received by that surface.
|-
| style="background: #F5FAFF" | [[Transmittance|Hemispherical transmittance]]
| {{mvar|T}}
| {{n/a}}
| Radiant flux ''transmitted'' by a ''surface'', divided by that received by that surface.
|-
| style="background: #F5FAFF" | [[Transmittance|Spectral hemispherical transmittance]]
| {{mvar|T<sub>ν</sub>}}<br />{{mvar|T<sub>λ</sub>}}
| {{n/a}}
| Spectral flux ''transmitted'' by a ''surface'', divided by that received by that surface.
|-
| style="background: #F5FAFF" | [[Transmittance|Directional transmittance]]
| {{math|''T''<sub>Ω</sub>}}
| {{n/a}}
| Radiance ''transmitted'' by a ''surface'', divided by that received by that surface.
|-
| style="background: #F5FAFF" | [[Transmittance|Spectral directional transmittance]]
| {{math|''T''<sub>Ω,ν</sub>}}<br />{{math|''T''<sub>Ω,''λ''</sub>}}
| {{n/a}}
| Spectral radiance ''transmitted'' by a ''surface'', divided by that received by that surface.
|-
| style="background: #FCF5FF" | [[Attenuation coefficient|Hemispherical attenuation coefficient]]
| {{mvar|μ}}
| m<sup>−1</sup>
| Radiant flux ''absorbed'' and ''scattered'' by a ''volume'' per unit length, divided by that received by that volume.
|-
| style="background: #FCF5FF" | [[Attenuation coefficient|Spectral hemispherical attenuation coefficient]]
| {{mvar|μ<sub>ν</sub>}}<br />{{mvar|μ<sub>λ</sub>}}
| m<sup>−1</sup>
| Spectral radiant flux ''absorbed'' and ''scattered'' by a ''volume'' per unit length, divided by that received by that volume.
|-
| style="background: #FCF5FF" | [[Attenuation coefficient|Directional attenuation coefficient]]
| {{math|''μ''<sub>Ω</sub>}}
| m<sup>−1</sup>
| Radiance ''absorbed'' and ''scattered'' by a ''volume'' per unit length, divided by that received by that volume.
|-
| style="background: #FCF5FF" | [[Attenuation coefficient|Spectral directional attenuation coefficient]]
| {{math|''μ''<sub>Ω,''ν''</sub>}}<br />{{math|''μ''<sub>Ω,''λ''</sub>}}
| m<sup>−1</sup>
| Spectral radiance ''absorbed'' and ''scattered'' by a ''volume'' per unit length, divided by that received by that volume.
|}<noinclude>
{{Documentation}}<!--Please add this template's categories to the /doc subpage, not here - thanks!-->
</noinclude>