导线为什么能够束缚住电磁波?电磁波具有能量,电磁波传播不需要介质,那导线的作用是什么? 知乎 Template




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tomski导线为什么能够束缚住电磁波?电磁波具有能量,电磁波传播不需要介质,那导线的作用是什么? 知乎 coloring