Luminous flux and luminous intensity are related as
A
ϕ=4πI
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B
ϕ=14π
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C
ϕ=4πI
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D
I=4πϕ
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Solution
The correct option is Aϕ=4πI Luminous flux is the amount of perceived power of light. It is measures energy.While luminous intensity I is ratio of luminous flux to solid angle