题目内容
一列波长大于1m的横波沿着
轴正方向传播,处在
和
的两质点
、
的振动图像如图所示。由此可知( )
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241341131346829.jpg)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824134112931266.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824134112962490.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824134113009535.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824134113040300.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824134113087309.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241341131346829.jpg)
A.波长为![]() |
B.波速为![]() |
C.![]() ![]() ![]() |
D.![]() ![]() ![]() |
A
由图可知,在开始时刻A在平衡位置向上振动,B在波峰,且波沿着
轴正方向传播,所以其波动图像如图所示,
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241341135081636.png)
由图得出AB间距为四分之三个波长,
,A对;由振动图像知T=4S,
,B错;3s末A质点在负的最大位移处,B质点在平衡位置,C错;1s末A质点在正的最大位移处,振动速度为零,B质点在平衡位置向下运动,振动速度最大,D错。
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824134112931266.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241341135081636.png)
由图得出AB间距为四分之三个波长,
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824134113539946.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241341136021037.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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