Question: Potassium has a work function of 2 . 3 eV . What is the longest wavelength of light that will release an electron from a

Potassium has a work function of 2.3 eV.
What is the longest wavelength of light that will release an electron from a potassium surface?Express your answer with the appropriate units.
A 2.7 eV photon strikes the surface of potassium and an electron is emmitted. What is the maximum possible speed of the electron?

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