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apostilb : ウィキペディア英語版
apostilb
The apostilb is an old unit of luminance, which was withdrawn from use in 1978. The SI unit of luminance is the candela per square metre (cd/m2). In 1942 it was 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/π · 10−4 sb
:3.14 asb = 1 cd/m2
==See also==
Other units of luminance:

* Lambert (L)
* Skot (sk)
* Bril (bril)
* Nit (nit)
* Foot-lambert (fL)


抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「apostilb」の詳細全文を読む



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