题目内容
一列简谐横波沿x轴正方向传播,t时刻波形图如图中的实线所示,此时波刚好传到P点,t+0.6s时刻的波形如图中的虚线所示,T>0.6s,a、b、c、P、Q是介质中的质点,则以下说法不正确的是
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250050506147549.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250050506147549.png)
A.这列波的波速为50m/s | B.质点a在这段时间内通过的路程等于30cm |
C.质点c在这段时间内通过的路程为20cm | D.t+0.5s时刻,质点b、P的位移相同 |
B
试题分析:由图可知,波的波长为40m;两列波相距0.6s=(n+
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825005050630393.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825005050661760.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250050506771237.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825005050630393.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825005050708769.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825005050723405.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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