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Question

What are the derived quantity of luminous intensity?

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Solution

Luminous intensity has S.I. unit as candela with symbol (cd).

Derived quantity of Luminous intensity
1.

Luminance candela per square meter cd/m²

2.Illuminance

illuminance lux lx lm/m² m²·m^-4·cd = m^-2·cd

3.Luminous flux

luminous flux lumen lm cd·sr ^(c) m²·m^-2·cd = cd

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Q. Mark out the correct options.
(a) Luminous flux and radiant flux have same dimensions.
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