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The electric field at a point associated...

The electric field at a point associated with a light wave is `E=100Vm^-1 sin [(3*0xx10^15 s^-1)t] sin [(6*0xx10^15s^-1)t].` If this light falls on a metal surface having a work function of `2*0 eV`, what will be the maximum kinetic energy of the photoelectrons?

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The correct Answer is:
`((9xx10^(15))/(2pie)h-2)eV=3.93 eV`
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