About 5% of the power of a 100 W light bulb is converted to visible radiation . What is the average intensity of visible radiation at a distance of 1
About 5% of the power of a 100 W light bulb is converted to visible radiation . What is the average intensity of visible radiation at a distance of 1 m from the bulb ?
Assume that the radiation is emitted isotropically and neglect reflection .
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Intensity, `I=("Power of visible light")/("area")=(100xx(5//100))/(4 pi(l)^(2))=0.4 W//m^(2)`
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