-
在一列横波的传播方向上,某时刻有两个质点的位移相同,且不等于零,则这两个质点的间距不可能( )
A.小于半个波长
B.等于半个波长
C.大于半个波长且小于波长
D.等于波长
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在一列横波的传播方向上,某时刻有两个质点的位移相同,且不等于零,则这两个质点的间距不可能[ ]
A.小于半个波长 B.等于半个波长 C.大于半个波长且小于波长 D.等于波长
-
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAG4AAAAoCAYAAAAfWs+KAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAC0SURBVHhe7dpBCoAwDADB/v/TFUUlSCuIIWVh
B3JQb1nak60LyXBQJeFaa8coT9k2DZfLcFCl4bwy8yw5ccb7z3BQhoMqDXeN/kvdonHqGA7q3nBc
ugOYs5tgDAdlOCjDQRkOynBQhoMyHJThoAwHZTgow0EZDspwUIaDMhyU4aAMB2U4KMNBGQ7KcFCG
G4i/wT3N3lcz3MAsXHxeHc9wA7Nwu7dvlQz3QYxlOJh44tbF630DnGe4555qFSsAAAAASUVORK5C
YILoj4HkvJjnvZE=
)
一列横波在向右传播过程中,a和b两个质点在某一时刻处于如图所示的位置,其中b在平衡位置,a在最大位移处,在波的传播方向上,a、b两质点相距35cm,且大于一个波长而小于两个波长,则该波波长可能为________.
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一列简谐横波在均匀介质中传播,某时刻,在该波传播方向上有P、Q两质点,它们的位移大小相等、方向相反,则下列说法正确的是( )
A.此时刻P、Q两质点间的距离可能等于半个波长
B.此时刻P、Q两质点的速度方向可能相同
C.从此时刻开始,波从P点传到Q点所需时间可能等于一个周期
D.若该波的频率增加一倍,则波从P点传到Q点的时间将减少一半
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一列简谐横波在均匀介质中传播,某时刻,在该波传播方向上有P.Q两质点,它们的位移大小相等.方向相反,则下列说法正确的是 ( )
A.此时刻P.Q两质点间的距离可能等于半个波长
B.此时刻P.Q两质点的速度方向可能相同
C.从此时刻开始,波从P点传到Q点所需时间可能等于一个周期
D.若该波的频率增加一倍,则波从P点传到Q点的时间将减少一半
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一列周期为了的正弦横波沿x轴正方向传播,ab为x轴上的两个质点,其间距小于一个波长,某时刻质点a恰好通过平衡位置向上运动,质点b振动到x轴上方的最高点.则从此刻起,再经
时,ab间的波形为( )
A.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAIkAAAA1CAYAAAB1LMjHAAAAAXNSR0IArs4c6QAAAARnQU1BAACx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)
B.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAIgAAAAzCAYAAABMt0DkAAAAAXNSR0IArs4c6QAAAARnQU1BAACx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)
C.![](https://img.xintiku.com/upload/97/c5/97c5f4e5ea352436104346dd88fb2362.png)
D.
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〔物理--选修3-4〕
(1)如图所示,一列简谐横波沿x轴正方向传播,波长为λ.某一时刻,在介质中取位移沿y轴正方向且大小等于振幅一半的相邻两质点P1、P2,已知P1的x坐标小于P2的x坐标,下列判断正确的是______(填入正确选项前的字母).
A.若P1P2<
,则P1向上运动,P2向下运动
B.若P1P2<
,则P1向下运动,P2向上运动
C.若P1P2>
,则P1向上运动,P2向下运动
D.若P1P2>
,则P1向下运动,P2向上运动
(2)如图所示,横截面为四分之一圆的柱形玻璃砖放在水平面MN上,O点是圆心.一列与OA面等高的平行光束沿水平方向垂直射向玻璃砖的OA面,平行光束通过玻璃砖后在水平面MN上留下照亮的区域.已知玻璃砖的折射率为n(n<2),不考虑光在OA、OB面的反射.问:
①若在玻璃砖左侧竖直放置一遮光板,使水平面BN不被照亮,遮光板的最小高度是多少?
②撤去遮光板,从OA的中点射入的光,在MN上的P处留下一个光点,P点到O点的距离是多少?
-
〔物理--选修3-4〕
(1)如图所示,一列简谐横波沿x轴正方向传播,波长为λ.某一时刻,在介质中取位移沿y轴正方向且大小等于振幅一半的相邻两质点P1、P2,已知P1的x坐标小于P2的x坐标,下列判断正确的是______(填入正确选项前的字母).
A.若P1P2<
,则P1向上运动,P2向下运动
B.若P1P2<
,则P1向下运动,P2向上运动
C.若P1P2>
,则P1向上运动,P2向下运动
D.若P1P2>
,则P1向下运动,P2向上运动
(2)如图所示,横截面为四分之一圆的柱形玻璃砖放在水平面MN上,O点是圆心.一列与OA面等高的平行光束沿水平方向垂直射向玻璃砖的OA面,平行光束通过玻璃砖后在水平面MN上留下照亮的区域.已知玻璃砖的折射率为n(n<2),不考虑光在OA、OB面的反射.问:
①若在玻璃砖左侧竖直放置一遮光板,使水平面BN不被照亮,遮光板的最小高度是多少?
②撤去遮光板,从OA的中点射入的光,在MN上的P处留下一个光点,P点到O点的距离是多少?
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如图所示,一列简谐横波在x轴上传播,在t时刻,质点立于正向最大位移处,在t +Δt时刻,另一质点Q位于正向最大位移处在,P、Q在x方向的距离为Δx。下列判断错误的是
![](https://img.xintiku.com/upload/ac/c2/acc22f44a6bf7e779787988041dead9f.png)
A. 波长一定等于Δx
B. 波的周期一定等于Δt
C. 波的传播速度大小不一定等于Δx/Δt
D. 波动频率一定等于波源的振动频率
E. 波的传播方向一定是向x轴正方向传播
-
![](https://img.xintiku.com/upload/4e/5b/4e5b83add53bfe2a65275ea0e4d642d0.png)
如图所示,一列简谐横波沿x轴正方向传播着,各质点的振幅都是2cm.某时刻P、Q两质点的位移都是1cm,质点P的速度方向沿y轴负方向,质点Q与之相反.已知P、Q两质点相距60m,则这列波的波长最长可能是________m.