Electron Beam Representaiton Watch

Russels_Teapot
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Report Thread starter 8 years ago
#1
I'm stuck on the following part of a problem:

An electron beam is represented by the plane wave expi(k1x + k2y) where k1 and k2 are the x and y components of the wavevector. Calculate their values if the electron energy is 10eV and the beam travels at 15 degrees to the y axis.

My working is that lambda = hc / E and that k = 2pi / lambda. Then k1 = k sin15 and k2 = kcos15. The problem is that my values are out by a factor of 1000 (they should be of the order 1x10^9 but mine are of the order 1x10^6) .

Does anyone have any suggestions?

Thanks in advance.
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