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13 有一長度為 L 的彈性繩兩端固定,撥動繩子形成三個節點、兩個反節點的駐波,測量發現駐波頻率為f,則彈性繩上行進波的波速為何? (A) fL (B)3fL/2 (C)2fL (D)3fL
問題詳情
13 有一長度為 L 的彈性繩兩端固定,撥動繩子形成三個節點、兩個反節點的駐波,測量發現駐波頻率為f,則彈性繩上行進波的波速為何?
(A) fL
(B)3fL/2
(C)2fL
(D)3fL
參考答案
答案:A
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面試倒楣鬼-22幸運上後西
】評論
如圖, L = λ, 則 v.....看...
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