Beams and time dependence
- From: "Zinc Potterman" <zincnews@xxxxxxxxxxxxxxxxx (delete 123's to reply)>
- Date: Thu, 12 Jan 2006 11:28:15 +0000 (UTC)
My physics book uses the expression;
psi(x) = A exp(ikx) + B exp (-ikx)
to model the incident and reflected components of a steady state beam of
particles of well defined momentum as they scatter normally from a surface.
(transmitted part not included)
It describes these as waves travelling in a region of zero potential.
In what sense are they *travelling* if there is no time dependence.
Earlier chapters introduce travelling waves as functions of the form
y(x.t) = Asin(kx+wt)
which I can follow.
Any tips links would be most welcome please.
Regards
Zinc
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