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
Estrella Cabeza Candela Estrella Cabeza Candela Estrella Cabeza Candela (; born 20 February 1987) is a Spanish professional tennis player. Cabeza Candela has won 11 singles and 13 doubles titles on the ITF circuit in her career. On 13 May 2013, she reached her best singles ranking of world number 95. On 2 April 2012, she peaked at world number 176 in the doubles rankings. Her best result in a WTA tournament is semifinals, reached in Hobart 2014. Cabeza Candela was born in Los Palacios y Villafranca. Coached by Gonzalo Lopez and Martin Vilar. Parents are Manuel Cabeza (tennis coach) and Estrella Candela;