Candela unit, the "candela". In 1967 the 13th CGPM removed the term "new candle" and gave an amended version of the candela definition, specifying the atmospheric pressure applied to the freezing platinum: The candela is the luminous intensity, in the perpendicular direction, of a surface of square metre of a black body at the temperature of freezing platinum under a pressure of newtons per square metre. In 1979, because of the difficulties in realizing a Planck radiator at high temperatures and the new possibilities offered by radiometry, the 16th CGPM adopted the modern definition of the candela. The arbitrary (1/683) term
Félix Candela many of his peers, Candela didn’t show intellectual or aesthetic efforts in school. He didn’t even like pure mathematics. When Candela was a student in Madrid, the schools taught the theory of elasticity where Candela assisted the professors and even tutored other students. His studies ended very quickly when the Spanish civil war began in 1936. When Candela returned to Spain to fight, he sided with the republic and fought against Franco. Candela became a Captain of Engineers for the Spanish republic after a short period of time. Unfortunately, while participating in the civil war, Candela was imprisoned in the