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A 2.50 W beam of light of wavelength 124 nm falls on a metal surface. You observe that the maximum kinetic
energy of the ejected electrons is 4.16 eV. Assume that each photon in the beam ejects a photoelectron.
(a) What is the work function (in electron volts) of this metal?
(b) How many photoelectrons are ejected each second from this metal?

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