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Q.15A photon of energy hv is absorbed by a freeelectron of a metal having work function< hv(A) The electron is sure to come out(B) The electron is sure to come out with akinetic energy hv-ф(C) Either the electron does not come out orit comes out with a kinetic energy hv(D) It may come out with a kinetic energyless than hv-φ

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