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Light of wavelength 342 nm shines on a metal surface and the stopping potential V0 in...

Light of wavelength 342 nm shines on a metal surface and the stopping potential V0 in a photoelectric experiment is observed to be 0.850 V.

a) What is the work function φ of the metal? (eV)

b) What is the maximum kinetic energy of the ejected electrons (in Joules)?

c) What is the longest wavelength light that will still allow electrons to escape the metal?(nm)

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