※ 引述《dxdxt.bbs@ptt.cc (   )》之銘言：
:  後來產生破壞性干涉時,能量跑去哪兒了@@
:                                         謝謝
  going back to the source

 of course, when you are thinking about this question, you were
thinking about the non-realistic plane wave. Thus, where is the fucking
source? As a result, you thought that some energy is missing because
you do not have a source to begin with.


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