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Homework Help: Stopping Potential

  1. Oct 28, 2008 #1
    The stopping potential for electrons emitted from a surface illuminated by light of wavelentgh 491 nm is 0.710V. When the incident wavelentgh is changed to a new value, stopping potential is 1.43V.

    a) What is this new wavelentgh?

    b) What is the work function for the surface?

    hf = Kmax

    do you have an idea ?
    please help.
  2. jcsd
  3. Oct 28, 2008 #2
    Hi getcarter. You have to show what you've tried first...(same goes for your Compton shift problem)...
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