Probability Flux for the Potential Step *
The probability flux is given by
We can save some effort by noticing that this contains an expression minus its complex conjugate.
(This assures that term in brackets is imaginary and the flux is then real.)
The probability to be reflected is the reflected flux divided by the incident flux.
In this case its easy to see that its
as we said.
The probability to be transmitted is the transmitted flux divided by the incident flux.
again as we had calculated earlier.