题目内容
两列振幅、波长和波速都相同的简谐波a和b分别沿x轴的正方向、负方向传播波速v=200m/s,在t=0时刻的部分波形如图所示,那么在x轴上x=450m的质点P,经最短时间t1出现位移最大值,经最短时间t2出现位移最小值,则t1、t2分别是
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241319439168466.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241319439168466.png)
A.1.75s,1.25s | B.0.25s,0.75s |
C.1.25s,0.75s | D.0.25s ,1.25s |
B
当a,b两列波的波峰传播至P点时,位移最大t=
=0.25s,
同理当a,b两列波的波谷传播至P点时,位移最大t=
=0.75s
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824131943978660.png)
同理当a,b两列波的波谷传播至P点时,位移最大t=
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824131944088688.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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