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Find the number of photons emitted per s...

Find the number of photons emitted per second by a 40 W source of monochromatic light of wavelength 6000Å . What is the photoelectric current assuming 5% effeciency of photoelectric effect? Given `h=6.62xx10^(-34)Js and c=3xx10^(8) ms^(-1),e=1.6xx10^(-19)C`

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