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Find the maximum kinetic energy of photo...

Find the maximum kinetic energy of photo -electron liberated from the surface of lithium `(phi=2.39 eV)` by electromagnetic radiation whose electric component varies with time as `E=a(1+cosomega t )cos omega_(0)t`, where 'a' is a constant , `omega=6xx10^(14)rad//sec`.and `omega_(0)=3.60xx10^(15)rad//s`

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0.37 eV
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