The photoelectric threshold wavelength of a tungsten, Physics

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The photoelectric threshold wavelength of a tungsten

The photoelectric threshold wavelength of a tungsten surface is 272 nm.

a) What is the threshold frequency of this tungsten?

b) What is the work function (in eV) of this tungsten?

c) Calculate the maximum kinetic energy (in eV) of the electrons ejected from this tungsten surface by ultraviolet radiation of frequency 1.46 x 10^15 Hz.

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