题目内容
一列波长大于1 m的横波沿着x轴传播,处在x1=1 m和x2=2 m的两质点A、B的振动图象如图所示.由此可知( )
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241357305387195.png)
A.波长可能为
m B.波速可能为1 m/s
C.3 s末A、B两质点的位移相同
D.1 s末A点的振动速度大于B点的振动速度
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241357305387195.png)
A.波长可能为
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824135730584373.png)
C.3 s末A、B两质点的位移相同
D.1 s末A点的振动速度大于B点的振动速度
AB
由振动图像可知AB两质点振动步调差
,或
,如果波由A点传播到B点,则AB间距离
,A对;周期为4s,同理可判断B对;有振动图像可知C错;1 s末A点的振动速度为零,D错;
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824135730616805.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824135730662827.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241357306941000.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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