A photon of energy is 6.2ev is allowed to strike a netal surface of work function 3.7ev kinetic energy of electron ejection will be?
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Work function of a metal is defined as the minimum energy required to eject out electron from metal surface . When a photon of energy 3.4eV is incident on a metal , 2eV energy will be used in ejecting an electron , because the work function of metal is 2eV . And the remaining energy 3.4−2=1.4eV , will be used by ejected electron as maximum kinetic energy .
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