Question

What is meant by luminous intensity?What is a lumen?​

Answer 1

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In photometry, luminous intensity is a measure of the wavelength-weighted power emitted by a lightsource in a particular direction per unit solid angle, based on theluminosity function, a standardized model of the sensitivity of the human eye. The SI unit ofluminous intensity is thecandela (cd), an SI base unit.

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Answer 2

luminous intensity is the unit of wavelength weighted power emitted by a light source