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Homework Help: Step Potential in QM

  1. Jul 16, 2015 #1
    1. The problem statement, all variables and given/known data

    V(x) = -V ( if x > 0 )
    0 ( if x <= 0)
    ( V is positive constant)

    the transmission coefficient is not simply F2 / A2 ( with A the incident amplitude and F the transmitted amplitude ), because the transmitted wave travels at a different speed.

    Calculate transmission coefficient.

    Q. I know transmission coefficient is probability of transmission. then I wonder why transmission coefficient has relevance to velocity??
  2. jcsd
  3. Jul 16, 2015 #2


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    Hello again! Please use the template, don't erase it. That's a no-no in PF !

    Under 2. you could write a few wave functions for a free particle in the two regions and then in 3. look at the boundary conditions at x = 0.

    Or google....
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