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Light rays of wave length 6000A and photon intensity 39.6W/m2 is incident on metal surface. If only 1% of photon incident on surface emit photo electrons, than the number of electrons omitted per second per unit area from the surface will be : (h=6.64×1034 Is ; c=3×108m/s)

12×101810×101812×101712×1016
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