Candela one candela. If emission in some directions is blocked by an opaque barrier, the emission would still be approximately one candela in the directions that are not obscured. The word "candela" means "candle" in Latin. Like most other SI base units, the candela has an operational definition—it is defined by a description of a physical process that will produce one candela of luminous intensity. Since the 16th General Conference on Weights and Measures (CGPM) in 1979, the candela has been defined as: The candela is the luminous intensity, in a given direction, of a source that emits monochromatic radiation of
Félix Candela the permanent collection of the Department of Drawings & Archives in the Avery Architectural and Fine Arts Library at Columbia University in New York City. Félix Candela Félix Candela Outeriño (; January 27, 1910 – December 7, 1997) was a Spanish and Mexican architect who was born in Madrid and at the age of 26, emigrated to Mexico, acquiring double nationality. He is known for his significant role in the development of Mexican architecture and structural engineering. Candela’s major contribution to architecture was the development of thin shells made out of reinforced concrete, popularly known as "cascarones". He was a