Zinc has a work function of 4.3 eV.a. What is the longest wavelength of light that will release an electron from a zinc surface?b. A 4.7 eV photon strikes the surface and an electron is emitted. What is the maximum possible speed of the electron?

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Chapter27: Quantum Physics
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Zinc has a work function of 4.3 eV.
a. What is the longest wavelength of light that will release an electron from a zinc surface?
b. A 4.7 eV photon strikes the surface and an electron is emitted. What is the maximum possible speed of the electron?

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