apostilb
Sign in to saveAlso known as blondel, asb
The apostilb is an obsolete unit of luminance. The SI unit of luminance is the candela per square metre (cd/m2). In 1942 Parry Moon proposed to rename the apostilb the blondel, after the French physicist André Blondel. The symbol for the apostilb is asb.
Wikidata facts
Show 3 more facts
- conversion to SI unit
- 0.3183098861837906715377675267450287240689192914809128974953346881177935952684530701802276055325061719121456854535159160737858
- Wikidata SPARQL query equivalent
- wd:Q619941 p:P2370/psn:P2370 [wikibase:quantityAmount ?source; wikibase:quantityUnit ?base]. ?item p:P2370/psn:P2370 [wikibase:quantityAmount ?target; wikibase:quantityUnit ?base]. BIND(?source / ?target as ?value)
- unit symbol
- asb
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Article
3 sectionsContents
- Table of SI photometry quantities for reference
- See also
- References
The apostilb is an obsolete unit of luminance. The SI unit of luminance is the candela per square metre (cd/m2). In 1942 Parry Moon proposed to rename the apostilb the blondel, after the French physicist André Blondel. The symbol for the apostilb is asb.
The apostilb is defined in terms of another unit of luminance, the stilb (sb): 1 asb = 1/ ⋅ 10−4 sb asb = 1 cd/m2
Connections
International System of Units
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illuminance
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exposure
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candela per square metre
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luminous efficacy of radiation
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photon
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watt
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digital object identifier
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unit of measurement
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candela
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steradian
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lumen
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luminous intensity
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lux
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bibcode
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centimeter–gram–second system of units
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photometry
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luminous flux
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solid angle
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luminance
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