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Iron has a work function of 7.47x10*J, or 4.67eV. a) Determine the minimum frequency, fo, of a photon that will eject electrons from iron. b)

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Iron has a work function of 7.47x10""*J, or 4.67eV. a) Determine the minimum frequency, fo, of a photon that will eject electrons from iron. b) X-ray light with a frequency of 7.9x10"Hz now strikes the iron plate. Determine the kinetic energy of the ejected electrons. ( A-10)

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