题目内容
如图所示为一列横波在某一时刻的图象.波的传播速度v是10m/s,这列波的波长和周期分别是( )
![](http://thumb.1010pic.com/pic2/upload/papers/20140610/201406102213528302527.png)
A.4.0m,0.40s | B.8.0m,0.80s | C.4.0m,2.5s | D.8.0m,1.25s |
![](http://thumb.1010pic.com/pic2/upload/papers/20140610/201406102213528302527.png)
根据波长等于相邻两个波峰或波谷间的距离.由图读出该波的波长为:λ=8.0m
由波速公式v=
得周期为:T=
=
s=0.8s,故B正确.
故选:B.
由波速公式v=
λ |
T |
λ |
v |
8 |
10 |
故选:B.
![](http://thumb2018.1010pic.com/images/loading.gif)
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