The work function for barium is 250 ev find the cutoff, Physics

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The work function for barium is 250 ev find the cutoff

The work function for barium is 2.50 eV.

(a) Find the cutoff wavelength for barium.

(b) What is the lowest frequency of light incident on barium that releases photoelectrons from its surface?

Hz

(c) If photons of energy 3.92 eV are incident on barium, what is the maximum kinetic energy of the ejected photoelectrons?

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Physics: The work function for barium is 250 ev find the cutoff

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