Question: Iron has a work function of 4 . 7 eV . What is the longest wavelength of light that will release an electron from a

Iron has a work function of 4.7 eV . What is the longest wavelength of light that will release an electron from a iron surface? A 5.5 eV photon strikes the surface of iron and an electron is emitted. What is the maximum possible speed of the electron?

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