Photoelectric EffectHard
Question
A source of light emits a continuous stream of light energy which fall on a given area. Luminous intensity is defined as :
Options
A.Luminous energy emitted by the source per second
B.Luminous flux emitted by the source per unit solid angle
C.Luminous flux falling per unit area of a given surface
D.Luminous flux coming per unit area of an illuminated surface
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