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範例:共鳴空氣柱與聲波的駐波[92指考]

某音叉振動所產生的聲波在大氣中傳播時,空氣分子的振動位移隨著時間的變化如下圖所示,利用此音叉可於兩端開口的開管空氣柱中形成駐波。若波速為340 m/s,則下列敘述何者正確?(A)大氣中的聲波頻率為1000 Hz (B)大氣中的聲波波長為0.17 m (C)在開管空氣柱中,相鄰兩波腹的間距為0.34 m (D)要形成駐波,開管最短約可為0.17 m (E)開管的兩端為波節。[92指定考]


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Posted in 歷屆物理考題, 聲音的駐波.

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