GR0877 Problem 89
PROBLEM STATEMENT: This problem is still being typed.
SOLUTION: (D) The reflection coefficient is defined in terms of the incident and reflected probability current density : , where and . Thus, . According to the standard boundary conditions, is always continues and is continues (except at points where the potential becomes infinite). Therefore, for the point one has for continuity of and for continuity of . From these two equations and .
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