题目内容
一列简谐横波沿x轴正方向传播,振幅为A.t=0时,平衡位置在x=0处的质元位于y=0处,且向y轴负方向运动;此时,平衡位置在x="0.15" m处的质元位于y=A处.该波的波长可能等于( )
A.0.60 m B.0.20 m
C.0.12 m D.0.086 m
A.0.60 m B.0.20 m
C.0.12 m D.0.086 m
AC
由题意知,其波形如下图.所以,
λ,λ=
m,(n=0,1,2……),当n=0时,λ="0.6" m,A对;当n="1,λ=0.12" m,C对,故选A?C.
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241424430656630.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824142442925807.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824142443003803.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241424430656630.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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