Candela of a single point light source of intensity "I", at a distance "r" and normally incident, this reduces to Candela The candela ( or ; symbol: cd) is the base unit of luminous intensity in the International System of Units (SI); that is, luminous power per unit solid angle emitted by a point light source in a particular direction. Luminous intensity is analogous to radiant intensity, but instead of simply adding up the contributions of every wavelength of light in the source's spectrum, the contribution of each wavelength is weighted by the standard luminosity function (a model of the sensitivity
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;