| 词条 | Apostilb |
| 释义 |
The apostilb is an old unit of luminance, which was withdrawn from use in 1978.{{By whom|date=August 2011}}{{Citation needed|date=August 2011}} The SI unit of luminance is the candela per square metre (cd/m2). In 1942 it was proposed{{By whom|date=August 2011}} 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/π · 10−4 sb 3.14 asb = 1 cd/m2 See alsoOther units of luminance:
3 : Photometry|Units of luminance|Centimetre–gram–second system of units |
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