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1.2 Wave packet 13
A(k)
1
0 k
(a) k 1 k 2
B(x, t)
∆k/Ö2π
x 2 v t
g
(b) 22π/∆k 0 2π/∆k
Figure 1.6 (a) A square pulse wave number distribution. (b) The modulating function
corresponding to the wave number distribution in Figure 1.6(a).
Re Ψ(x, t)
x
Figure 1.7 The real part of a wave packet for a square pulse wave number distribution.
