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Photopic (black) an scotopic[1] (green) luminosity functions. The photopic includes the CIE 1931 staundart[2] (solid), the Judd–Vos 1978 modified data[3] (dashed), an the Sharpe, Stockman, Jagla & Jägle 2005 data[4] (dottit). The horizontal axis is wavelenth in nm.
Unit information
Unit seestemSI base unit
Unit oLuminous intensity

The candela (seembol: cd) is the SI base unit o luminous intensity; that is, luminous pouer per unit solit angle emittit bi a pynt licht soorce in a pairteecular direction.

References[eedit | eedit soorce]