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damgo
#7
Mar19-03, 12:39 PM
P: n/a
If you're talking QM in the time-independent case, then it's just convention that the + waves goes right and the - goes left. It's actually erroneous to say they're going anywhere; "time-independent" scattering is a sort of vague approximation they teach you in beginning classes -- but of course they never explain why it works. :)