A vibration source and a medium are needed to form a mechanical wave.
机械波的形成需要振源和介质。
There are different viewpoints about the wave source in the experiment of vibration of string.
在弦振动“驻波”实验中，对于起振端是波节还是波腹，存在不同的认识。
There are different viewpoints about the wave source in the experiment of vibration of string.
从数学上证明了上端固定、下端作圆周运动的弦振动会形成驻波 。
There are different viewpoints about the wave source in the experiment of vibration of string.
从数学上证明了上端固定、下端作圆周运动的弦振动会形成驻波 。
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