本题目来源于试卷: gc textbook chapter 11 Vibrations and Waves，类别为 通用国际物理
[问答题]
If we knew that energy was being transmitted from one place to another, how mi v3)x4 ef90z;j,t.vjr vwugjx gh j.xz3v j;9v g0r txf4,)evwju*rcg.cfb3 t:8 hdxkt (t we determine whether the energy was being .:fc bgkch3t* t(drx8carried by particles (material bodies) or by waves?
参考答案:
A major distinction between energy transfer by particles and energy transfer by waves is that particles must travel in a straight line from one place to another in order to transfer energy, but waves can diffract around obstacles. For instance, sound can be heard around a corner, while you cannot throw a ball around a corner. So if a barrier is placed between the source of the energy and the location where the energy is being received, and energy is still received in spite of the barrier, it is a good indication that the energy is being carried by waves. If the placement of the barrier stops the energy transfer, it could be that the energy transfer is being carried out by particles. It could also be that the energy transfer is being carried out with waves whose wavelength is much smaller than the dimensions of the barrier.
本题详细解析:
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