Wave Propagation in Linear Media | re-examined

Interlude
whatsoever. Consequently the interference peaks in front of the interface can grow higher
than its top without swashing over it.
The even pages depict the evolution of an initially triangular wave packet impinging on a
step barrier like in section 4.3. The parameters of this wave packet are k =3and =0:8.
The spatial region of interest is [,40; 40], and like before, the time interval is [0; 42]. Here,
too, the height of the barrier is shown only for graphical reasons and has no actual meaning.
In order to provide a spectacular result, the wave number spectrum was chosen so as to
comprise considerable pass-band components as well, which is why we can see a small and
rapidly widening wave running further into the barrier.
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