摘要:D.这列波的传播方向上与质点A相对平衡位置的位移总是相等的点距原点至少1.5m
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在波的传播方向上,距离一定的P与Q点之间只有一个波谷的四种情况,如图A、B、C、D所示.已知这四列波在同一种介质中均向右传播,则质点P能首先达到波谷的是
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A.
B.
C.
D.
在同一介质中的波的传播方向上,距离一定的P与Q点之间只有一个波谷的四种情况,如图A、B、C、D所示。已知这四列波在同一种介质中均向右传播,则质点P能首先达到波谷的是
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A.![](http://thumb.1010pic.com/pic1/upload/papers/g04/20110314/201103141344271951066.gif)
![](http://thumb.1010pic.com/pic1/upload/papers/g04/20110314/201103141344271951066.gif)
B.![](http://thumb.1010pic.com/pic1/upload/papers/g04/20110314/201103141344432111061.gif)
![](http://thumb.1010pic.com/pic1/upload/papers/g04/20110314/201103141344432111061.gif)
C.![](http://thumb.1010pic.com/pic1/upload/papers/g04/20110314/201103141344537261080.gif)
![](http://thumb.1010pic.com/pic1/upload/papers/g04/20110314/201103141344537261080.gif)
D.![](http://thumb.1010pic.com/pic1/upload/papers/g04/20110314/20110314134505023997.gif)
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![](http://thumb.1010pic.com/pic1/upload/papers/g04/20110314/20110314134505023997.gif)
在同一介质中的波的传播方向上,距离一定的P与Q点之间只有一个波谷的四种情况,如图A、B、C、D所示。已知这四列波在同一种介质中均向左传播,则质点P能首先达到波谷的是
[ ]
A.![](http://thumb.1010pic.com/pic1/upload/papers/g04/20110314/201103141344271951066.gif)
![](http://thumb.1010pic.com/pic1/upload/papers/g04/20110314/201103141344271951066.gif)
B.![](http://thumb.1010pic.com/pic1/upload/papers/g04/20110314/201103141344432111061.gif)
![](http://thumb.1010pic.com/pic1/upload/papers/g04/20110314/201103141344432111061.gif)
C.![](http://thumb.1010pic.com/pic1/upload/papers/g04/20110314/201103141344537261080.gif)
![](http://thumb.1010pic.com/pic1/upload/papers/g04/20110314/201103141344537261080.gif)
D.![](http://thumb.1010pic.com/pic1/upload/papers/g04/20110314/20110314134505023997.gif)
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![](http://thumb.1010pic.com/pic1/upload/papers/g04/20110314/20110314134505023997.gif)
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(1)如图1所示,沿波的传播方向上有间距均为1m的6个质点a、b、c、d、e、f,它们均静止在各自的平衡位置.一列横波以1m/s的速度水平向右传播,t=0时到达质点a,质点a开始由平衡位置向上运动.t=1s时,质点a第一次到达最高点,则在4s<t<5s这段时间内:
A.质点c的加速度逐渐增大 B.质点a的速度逐渐增大
C.质点d向下运动 D.质点f保持静
(2)如图2所示,一束光线以60°的入射角射到一水平放置的平面镜上,反射后在上方与平面镜平行的光屏上留下一光点P,现在将一块上下两面平行的透明体平放在平面镜上,则进入透明体的光线经平面镜反射后再从透明体的上表面射出,打在光屏上的P′点,与原来相比向左平移了3.46cm,已知透明体对光的折射率为
3 |