The wave function of an electron in a linear accelerator is, Ask an Expert

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The wave function of an electron in a linear accelerator is given by ?(x)=(cosX)eikx+(sinX)eikx where X is a paramater. What for (linear combination) would the wavefunction have if it were 95% certain that the electron had linear momentum -k(hbar)? (teacher hint: find values for cosX, and sinX).

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