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A beam of light has three wavelengths 40...

A beam of light has three wavelengths `4000 Å, 5000 Å, 6000Å` with a total intensity `3 xx 10^(-3) W//m^(2)` equally distributed amongst the three wavelenth. The beam falls normally on an area `2 cm^(2)` of clean metallic surface of work function `2.4 eV`. Calculate photo current. (Assume each energetically suitable photon emits one electron)

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`1.4xx10^(-9)` A
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