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Light and Electrons

  1. Feb 24, 2005 #1
    What effect does the color of the light have on the release of electrons from a sodium metal surface?

    (a) Write a brief experimental design to answer this question
    (b) Would you expect all the colors of light to release electrons from the sodium metal? Justify your answer using the idea of photons.

    I think it has something to do with Bohr or photons?? I don't know where to start.
     
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  3. Feb 24, 2005 #2

    dextercioby

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    No,it has to do with the explanation A.Einstein found exactly 100 yrs ago to the PHOTOELECTRIC EFFECT...

    Daniel.
     
  4. Feb 24, 2005 #3

    So, I just explain the photoelectric effect for (a).

    I know this about it, but I don't know how to explain it (I think this is right):
    The photoelectric effect says that when you shine light on a metal it transfers to the electron.

    Higher intensity light has more photons, and so will knock out more electrons. However, if the frequency of the light is such that a single photon is not energetic enough to release an electron from the surface, then none will be ejected no matter how intense the light.
     
    Last edited: Feb 24, 2005
  5. Feb 25, 2005 #4

    dextercioby

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    Yes,that's pretty much what happens.

    Daniel.
     
  6. Feb 25, 2005 #5

    Gokul43201

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    Transfers what ?
     
  7. Feb 26, 2005 #6
    energy? .
     
  8. Feb 26, 2005 #7

    dextercioby

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    Energy and momentum,of course...

    Was the question intended for you...?:confused:

    Daniel.
     
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