Luminous Intensity
2-1-035
Luminous Intensity (of a source, in a given direction)
The quotient of the luminous flux (dF) leaving the source, propagated in an element of solid angle containing the given direction, by the element of solid angle (dO).
Symbol: I
Unit: candela(cd)
Reference: C.I.E. (modified)
Note 1: If within a cone of finite solid angle O the luminous flux may be considered uniformly distributed, then the luminous intensity is given by
(Equation)
where F is the total luminous flux emitted within the solid angle.
Note 2: The term Candlepower designates a luminous intensity expressed in candelas.
Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)
charge current
Intensity
candela
Contrast
Celsius (previously Centigrade)
Capacitance
Illuminance
Energy
nertia of the water plane
axis of the centre of water plane
force
Farad
Fahrenheit
International Association of Marine Aids to Navigation and Lighthouse Authorities - AISM
