The work function for zinc is 431 ev ultraviolet light of


The work function for zinc is 4.31 eV. Ultraviolet light of wavelength 144 nm is incident on the clean surface of a zinc sample. We wish to predict the stopping voltage we will need for electrons ejected from the surface.

(a) What is the photon energy of the ultraviolet light?

ev

b)What is the maximum kinetic energy of the ejected photoelectrons?

eV

(c) What stopping voltage would be required to arrest the current of photoelectrons?

V

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Physics: The work function for zinc is 431 ev ultraviolet light of
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