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Homework Help: Normalizing Psi when it has no complex numbers

  1. Aug 20, 2009 #1
    1. The problem statement, all variables and given/known data

    I need to square the magnitude of psi for each of my integrals

    2. Relevant equations

    for x between 0 and a, [tex]\psi(x,0)[/tex] = A(x/a), where A and a are constants

    3. The attempt at a solution
    So I take A(x/a) and square it since it is already positive. so [tex]A^2\ast(x^2/a^2)[/tex] . . but in the proof of my book, it makes use of the complex conjugate, which I am sure of how that fits for my particular psi function . . which makes me think that [tex]A^2\ast(x^2/a^2)[/tex] is not correct

    so is [tex]|\psi|^2[/tex] = [tex]A^2\ast(x^2/a^2)[/tex] if [tex]\psi[/tex] = A(x/a)
    in this example?
  2. jcsd
  3. Aug 20, 2009 #2


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    Yes. The complex conjugate of a real function is the function itself.
  4. Aug 20, 2009 #3
    Hmm, so i am worrying over nothing. I am so new to this that I don't really understand why the wave function would have a complex number in it sometimes and other times not have it, since I don't even really know what reason a complex number is for in a wave function.
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