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Basic probability for quantum mechanics

  1. Jun 25, 2011 #1
    1. The problem statement, all variables and given/known data
    See photo 1


    2. Relevant equations
    All formula for probability.


    3. The attempt at a solution
    See photo 2

    It seems traditional formula (involve summation) can't be used.
    So how to obtain answer for b.) and c.)?

    Also, I am not sure for part a.
     

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    Last edited: Jun 25, 2011
  2. jcsd
  3. Jun 25, 2011 #2

    George Jones

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    Is a sum always used to calculate expectation values?
     
  4. Jun 25, 2011 #3
    I think that is average value.
    To get expectation values, we need to have wave function.
    However, it seems there is no relation between the needle and wave function
     
  5. Jun 25, 2011 #4

    George Jones

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    Let me try again.

    Is a sum always used when calculating average values.
     
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