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What is the work function of a metal from which electrons are ejected with kinetic energy Ekin = 1.88 eV, and incident light has a wavelength of ë = 660 nm?
[h = 6.63 × 10-34 J s, c = 3 × 108 m/s, 1 eV = 1.6 × 10-19 J]
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