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598 CHAPTER 16 The Wave Equation
3 2
2.5
1.5
2
1.5
1
1
0.5
0.5
0
0
–4 –2 0 2 4 –4 –2 0 2 4
x x
FIGURE 16.15 t = 1. FIGURE 16.16 t = 1.5.
2 2
1.5 1.5
1 1
0.5 0.5
0 0
–4 –2 0 2 4 –4 –2 0 2 4
x x
FIGURE 16.17 t = 2. FIGURE 16.18 t = 2.5.
2
1.5
1
0.5
0
–4 –2 0 2 4
x
FIGURE 16.19 t = 3.
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