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2020-05-22View Original

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选择题:把一根十分长的绳子拉成水平,用手握其一端, 维持拉力恒定,使绳端在垂直于绳子的方向上作简谐振动,则( ) (A)振动频率越高,波长越长.(B)振动频率越低,波长越长.(C)振动频率越高,波速越大.(D)振动频率越低,波速越大. 答案:B 提示:能阐述出解题过程的给予额外奖励,答案回复可见!
Reply #22020-05-22
B. 解析:波速u=λv,λ为波长,v为频率,波速只与介质有关,所以波速不变,波长和频率成反比。
Reply #32020-05-22
B。波速u=λv,λ为波长,v为频率,波速只与介质有关,所以波速不变,波长和频率成反比
Reply #42020-05-22
C)振动频率越高,波速越大.
Reply #52020-05-22
(B)振动频率越低,波长越长.

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