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Light of frequency 2.17 × 1015 Hz illuminates a sodium surface. The ejected photoelectrons are found...

Light of frequency 2.17 × 1015 Hz illuminates a sodium surface. The ejected photoelectrons are found to have a maximum kinetic energy of 6.74 eV. Calculate the work function of sodium. Planck’s constant is 6.63 × 10−34 J · s. Your answer must be exact.

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Answer #1

2.25 eV

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