問題詳情
17．如图，一简谐横波在x轴上传播，轴上a、b两点相距12m。t ＝0时a点为波峰，b点为波谷；t ＝0.5s时，a点为波谷，b点为波峰。则下列判断中正确的是(A)波一定沿x轴正方向传播
(B)波长可能是8m
(C)周期可能是0.5s
(D)波速一定是24m/s
參考答案
答案：B
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)
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