使一彈簧沿其長度方向，來回振動後產生的彈簧波如下圖所示，則下列敘述何者正確？ (A)波從 a 點傳至 b 點所需時間為週期 (B)當波向前傳播時，能量沿圖中箭頭所指方向，朝右方傳播，彈簧也隨波

問題詳情

32. 使一彈簧沿其長度方向，來回振動後產生的彈簧波如下圖所示，則下列敘述何者正確？

(A)波從 a 點傳至 b 點所需時間為週期
(B)當波向前傳播時，能量沿圖中箭頭所指方向，朝右方傳播，彈簧也隨波向前移動
(C)若 a點來回振動一次耗時 3 秒，則 b 點來回振動一次耗時 2 秒
(D) a、b 點的振動方向垂直於波傳播方向。

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