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True or False Questions on the Photoelectric Effect

  1. Feb 25, 2013 #1
    1. The problem statement, all variables and given/known data
    1. The kinetic energy of emitted electrons depends on the frequency, not the number of photons.
    2. The energy of the radiation is proportional to the wavelength.
    3. The number of emitted electrons depends on the number of photons, not the frequency of the radiation.
    4. The radiation needs a minimum number of photons for any electrons to be released

    3. The attempt at a solution
    1. True. The KE of the photoelectrons depend on the frequency of the photon and on the work function of the material.
    2. False. The energy of the radiation is proportional to the inverse of the wavelength.
    3. False. The number of photoelectrons emitted depends on the intensity of the electromagnetic wave and the work function of the material.
    4. False. One photon interacts with one electron. Whether the electron is emitted depends on whether it absorbed enough energy to overcome the binding energy.

    Where am I going wrong?
     
  2. jcsd
  3. Feb 25, 2013 #2

    rude man

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    Homework Helper
    Gold Member

    I would rethink #3.

    Although strictly speaking that statement is not answerable as true or false. (What would happen if all the photons had too low a frequency?)
     
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