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On a photosensitive metal of area1 cm^(2...

On a photosensitive metal of area`1 cm^(2)` and work function 2eV, light of intensity `6.4 xx 10^(–5) W//cm^(2)` in wavelength 310 nm fall normally. If 1 out of every `10^(3)` photons are successful, then number of photoelectrons emitted in one second is 10x. Find x

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