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( => ( => ( => ISO 31-6 [pageid] => 3371516 ) =>

ISO 31-6 is the part of "international standard "ISO 31 that defines names and symbols for "quantities and "units related to "light and related "electromagnetic radiations. It is superseded by "ISO 80000-7.

Its definitions include:

Quantity Unit Remarks
Name Symbol Name Symbol Definition
...


) )