question_answer

A source of light emits a continuous stream of light energy which falls on a given area. Luminous intensity is defined as [CPMT 1986]

A)            Luminous energy emitted by the source per second

B)            Luminous flux emitted by 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