Calculate the intensity of illumination at a distance of 0.5m from a source of light of power 200 candela assuming normal incidence.

Calculate the intensity of illumination at a distance of 0.5m from a source of light of power 200 candela assuming normal incidence.
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Calculate the intensity of illumination at a distance of 0.5m from a source of light of power 200 candela assuming normal incidence.
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