CIE A Level Physics复习笔记8.1.1 The Principle of Superposition
The Principle of Superposition
- The principle of superposition states that when two or more waves with the same frequency travelling in opposite directions overlap, the resultant displacement is the sum of displacements of each wave
- This principle describes how waves which meet at a point in space interact
- When two waves with the same frequency and amplitude arrive at a point, they superpose either:
- in phase, causing constructive interference. The peaks and troughs line up on both waves. The resultant wave has double the amplitude
- or, in anti-phase, causing destructive interference. The peaks on one wave line up with the troughs of the other. The resultant wave has no amplitude
Waves in superposition can undergo constructive or destructive interference
- The principle of superposition applies to all types of waves i.e. transverse and longitudinal
Worked Example
Two overlapping waves of the same types travel in the same direction. The variation with x and y displacement of the wave is shown in the figure below.
Use the principle of superposition to sketch the resultant wave.
Exam Tip
The best way to draw the superposition of two waves is to find where the superimposed wave has its maximum and minimum amplitudes. It is then a case of joining them up to form the wave. Where the waves intersect determines how much constructive or destructive interference will occur.
转载自savemyexams
以上就是关于【CIE A Level Physics复习笔记8.1.1 The Principle of Superposition】的解答，如需了解学校/赛事/课程动态，可至翰林教育官网获取更多信息。
往期文章阅读推荐：
全网破防！ALevel CIE数学M1疑似错题？经济P2难度飙升？5月6日大考考情分析必看！
A-Level CIE就大规模泄题发布最严处罚！哪些考生必须重考？你的成绩怎么办？
翰林AMC8视频课重磅上线！
国际竞赛真题资源免费领取
