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Homework Help: Find the probability of measuring spin up an axis.

  1. Apr 14, 2015 #1
    1. The problem statement, all variables and given/known data

    Set |Ψ> = (1/√ 2) | ↑, z> + (e / √ 2) | ↓, z>.

    Find the probability of measuring the spin component of sz to be up the z-axis.
    Find the probability of measuring the spin component of sx to be up the x axis.

    2. Relevant equations

    I'm not sure.

    3. The attempt at a solution

    I think I have to find the projection along each axis in the required direction and then multiply by the complex conjugate. How would I go about finding a projection?

    Also, I have an equation for <sz>. Is this the same as finding the probability of spin up the z-axis?
    Last edited: Apr 14, 2015
  2. jcsd
  3. Apr 14, 2015 #2
    What gives you the probability of finding the particle in a determinate state in quantum mechanics?
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