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In a photoelectric e↵ect experiment, the maximum kinetic energy of electrons ejected from a cesium metal...

  1. In a photoelectric e↵ect experiment, the maximum kinetic energy of electrons ejected from a cesium metal plate is found to be 0.57eV when the plate is illuminated with 500 nm light.

    1. (a) Given what we know about the relation of wavelength and energy, how much energy does a single photon of 500 nm light have?

    2. (b) Given the results of this experiment, how much energy must the electron have used to break free of the atom?

    3. (c) When the same cesium plate is illuminated with 420 nm light, electrons ejected from the cesium have a maximum kinetic energy of 1.04 eV. Does this result confirm your previous calculation for the amount of energy it takes for an electron to break free from cesium?

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