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What is the stoping voltage

  1. Jul 12, 2005 #1
    Hi everyone.

    I came across with a problem in my question book which was

    "what is the stoping voltage when a UV ligh with WaveLength 200nm hits a clean gold surface.(5.1v Work Function.)"

    I have found the frequency which is [tex]1.5^15 Hz[/tex] I know the [tex]W[/tex] Therefore I can let [tex]Ekmax=(hf)-W[/tex] and [tex]Ekmax=qV[/tex]

    But when I put the equations together they dont make any sence to me.

    Can someone help me through this plz
  2. jcsd
  3. Jul 12, 2005 #2


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    Science Advisor
    Homework Helper

    1.You should have posted this in the homework section.

    2.Why don't they make any sense?

    It looks okay so far.

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