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[10^(-3)W" of "5000 AA" light is directe...

[10^(-3)W" of "5000 AA" light is directed on a photoelectric cell.If the current in the cell is "0.16 mu A," the "],[" percentage of incident photons which produce photoelectrons,is "],[[" (A) "0.4%," (B*) ".04%," (C) "20%," (D) "10%]]

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