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HELP on a Physics question (Quantum)!

  1. Jun 8, 2005 #1
    An incident radiation has a wavelength of 42.86 nm and is consequently enough to eject electrons through a retarding potential of 20.95 volts, so that they end up with a velocity of exactly 6.00 X 10^5 m/s. Calculate the work function of the particular metal. (Answer id electron volts)
     
  2. jcsd
  3. Jun 8, 2005 #2
    Do you have any ideas about what equation to use?
     
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