Candela frequency and that has a radiant intensity in that direction of watt per steradian. The definition describes how to produce a light source that (by definition) emits one candela, but does not specify the luminosity function for weighting radiation at other frequencies. Such a source could then be used to calibrate instruments designed to measure luminous intensity with reference to a specified luminosity function. An appendix to the SI Brochure makes it clear that the luminosity function is not uniquely specified, but must be selected to fully define the candela. The candela is sometimes still called by the old name
Félix Candela Perpignan Concentration camp in Perpignan, France until the end of the war in 1939. Candela had fought against Franco; therefore he could not stay in the new Spain as long as Franco was the head of state. After his name was selected with a few hundred other prisoners, Candela was put onto a ship bound for Mexico, where he would start his career. Candela married Eladia Martin when he moved to Mexico from Spain; there, they raised a family. In his early life, Felix was active in sports, particularly rugby and skiing. Candela worked very hard during his lifetime to