本题目来源于试卷: gc textbook chapter 11 Vibrations and Waves，类别为 IB物理学
[问答题]
When a standing wave exists) trbh,zlt 2c78fd ys+ on a string, the vibrations a*772gi nsyky5t gfj 3(d ywy:of incident and reflected 3gyk ( d7s:ji*g7yyny5fa wt2waves cancel at the nodes. Does this mean that energy was destroyed? Explain.
参考答案: The energy of a wave is not localized at one point, because the wave is not localized at one point, and so to talk about the energy “at a node” being zero is not really a meaningful statement. Due to the interference of the waves the total energy of the medium particles at the nodes points is zero, but the energy of the medium is not zero at points of the medium that are not nodes. In fact, the anti-node points have more energy than they would have if only one of the two waves were present.
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