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alpha>Abhishek: Created page with "{{anchor|table-si-photometry-units}} {| class="wikitable" |+ {{navbar-header |1={{resize|130%|{{#if:{{{1|}}}|Table {{{1}}}. }}SI photometry quantities}}|2=SI light u..."

2022-11-09T19:41:09Z

Created page with "{{anchor|table-si-photometry-units}} {| class="wikitable" |+ {{navbar-header |1={{resize|130%|{{#if:{{{1|}}}|Table {{{1}}}. }}SI photometry quantities}}|2=SI light u..."

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{{anchor|table-si-photometry-units}}
{| class="wikitable"
|+ {{navbar-header |1={{resize|130%|{{#if:{{{1|}}}|Table {{{1}}}. }}SI photometry quantities}}|2=SI light units}}
|-
! scope="col" colspan="2"| Quantity
! scope="col" colspan="2"| Unit
! scope="col" |[[Dimensional analysis#Definition|Dimension]]
!scope="col" rowspan="2"| Notes
|-
! scope="col" |Name
! scope="col" |Symbol{{#tag:ref|[[Standards organization]]s recommend that photometric quantities be denoted with a subscript "v" (for "visual") to avoid confusion with radiometric or [[photon]] quantities. For example: ''USA Standard Letter Symbols for Illuminating Engineering'' USAS Z7.1-1967, Y10.18-1967|group={{#if:{{{3|}}}|{{{3}}}|nb}}|name=note-suffix-v}}
! scope="col" |Name
! scope="col" |Symbol
! scope="col" |Symbol{{#tag:ref|The symbols in this column denote [[Dimension of a physical quantity|dimension]]s; "'''L'''", "'''T'''" and "'''J'''" are for length, time and luminous intensity respectively, not the symbols for the [[Units of measurement|unit]]s litre, tesla and joule.|group={{#if:{{{3|}}}|{{{3}}}|nb}}|name=note-dimension-symbol}}
|-
!scope="row" style="text-align:left" | [[Luminous energy]]
| ''Q''{{sub|v}}{{#tag:ref|Alternative symbols sometimes seen: ''W'' for luminous energy, ''P'' or ''F'' for luminous flux, and ''ρ'' for luminous efficacy of a source.|group={{#if:{{{3|}}}|{{{3}}}|nb}}|name=note-alternative-symbol-photometric}}
| [[lumen second]]
| [[lumen (unit)|lm]]⋅s
| '''T''' '''J'''
| The lumen second is sometimes called the ''talbot''.
|-
!scope="row" style="text-align:left" | [[Luminous flux]], luminous power
| ''Φ''{{sub|[[Luminosity function|v]]}}{{#tag:ref||group={{#if:{{{3|}}}|{{{3}}}|nb}}|name=note-alternative-symbol-photometric}}
| [[lumen (unit)|lumen]] (= candela [[steradian]])
| lm (= cd⋅sr)
| '''J'''
| Luminous energy per unit time
|-
!scope="row" style="text-align:left" | [[Luminous intensity]]
| ''I''{{sub|v}}
| [[candela]] (= lumen per steradian)
| [[candela|cd]] (= lm/sr)
| '''J'''
| Luminous flux per unit [[solid angle]]
|-
!scope="row" style="text-align:left" | [[Luminance]]
| ''L''{{sub|v}}
| [[candela per square metre]]
| cd/m{{sup|2}} (= lm/(sr⋅m{{sup|2}}))
| '''L'''{{sup|−2}}'''J'''
| Luminous flux per unit solid angle per unit ''projected'' source area. The candela per square metre is sometimes called the ''[[nit (unit)|nit]]''.
|-
!scope="row" style="text-align:left" | [[Illuminance]]
| ''E''{{sub|v}}
| [[lux]] (= lumen per square metre)
| [[lux|lx]] (= lm/m{{sup|2}})
| '''L'''{{sup|−2}}'''J'''
| Luminous flux ''incident'' on a surface
|-
!scope="row" style="text-align:left" | [[Luminous exitance]], luminous emittance
| ''M''{{sub|v}}
| lumen per square metre
| lm/m{{sup|2}}
| '''L'''{{sup|−2}}'''J'''
| Luminous flux ''emitted'' from a surface
|-
!scope="row" style="text-align:left" | [[Luminous exposure]]
| ''H''{{sub|v}}
| [[lux second]]
| lx⋅s
| '''L'''{{sup|−2}}'''T''' '''J'''
| Time-integrated illuminance
|-
!scope="row" style="text-align:left" | Luminous energy density
| ''ω''{{sub|v}}
| lumen second per cubic metre
| lm⋅s/m{{sup|3}}
| '''L'''{{sup|−3}}'''T''' '''J'''
|
|-
!scope="row" style="text-align:left" | [[Luminous efficacy]] (of radiation)
| ''K''
| lumen per [[watt]]
| lm/[[watt|W]]
| '''M'''{{sup|−1}}'''L'''{{sup|−2}}'''T'''{{sup|3}}'''J'''
| Ratio of luminous flux to [[radiant flux]]
|-
!scope="row" style="text-align:left" | [[Luminous efficacy]] (of a source)
| ''η''{{#tag:ref||group={{#if:{{{3|}}}|{{{3}}}|nb}}|name=note-alternative-symbol-photometric}}
| lumen per [[watt]]
| lm/[[watt|W]]
| '''M'''{{sup|−1}}'''L'''{{sup|−2}}'''T'''{{sup|3}}'''J'''
| Ratio of luminous flux to power consumption
|-
!scope="row" style="text-align:left" | [[Luminous efficiency]], luminous coefficient
| ''V''
|
|
| '''1'''
| Luminous efficacy normalized by the maximum possible efficacy
|-
| style="text-align:center;" colspan=9 | See also: [[SI]]{{·}} [[Photometry (optics)|Photometry]]{{·}} [[Radiometry]]{{#if:{{{2|}}}|{{·}} ([[{{#ifeq:{{{2}}}|self||Radiometry}}#table-si-radiometry-units{{!}}Compare]])}}
|}{{#if:{{{3|}}}||{{Reflist|group=nb}}}}<noinclude>

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Template:SI light units - Revision history

Indicwiki: 1 revision imported from :alpha:Template:SI_light_units

alpha>Abhishek: Created page with "{{anchor|table-si-photometry-units}} {| class="wikitable" |+ {{navbar-header |1={{resize|130%|{{#if:{{{1|}}}|Table {{{1}}}. }}SI photometry quantities}}|2=SI light u..."