题目内容
下图中给出某一时刻t的平面简谐波的图象和x=1.0 m处的质元的振动图象,关于这列波的波速v、传播方向和时刻t可能是( )
A. v=1m/s,t=0s B. v=1m/s,t="6" s
C. t=1s, 波向x轴负方向传播 D. t=5s, 波向x负方向传播![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241258523734569.png)
A. v=1m/s,t=0s B. v=1m/s,t="6" s
C. t=1s, 波向x轴负方向传播 D. t=5s, 波向x负方向传播
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241258523734569.png)
C
由图可知波长
,周期T=12s,波速
,x=1.0 m处的质元的振动图像,可知t时刻振动方向向上,根据“下坡向上”可知波沿x轴负方向传播,
,故可知正确选项为C
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824125853371561.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824125853683940.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824125853714569.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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