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波动是一种较为复杂的运动形式,相关问题具有信息量大,综合性强,对学生理解和推理能力要求较高的特点.本文将就近几年高考考查的波动问题进行归类解析.一、波动方向与振动方向例1(2005年理综全国卷Ⅲ)一列简谐横波在x轴上传播,某一时刻的波形如图1(实线)所示,a、b、c三个质元,a向上运动,由此可知()(A)该波沿x轴正方向传播
The fluctuation is a more complex form of movement. The related problems have the characteristics of large amount of information, strong comprehensiveness, and high requirements for students’ ability to understand and reason. This paper will classify and analyze the problems of the examination of the college entrance examination in recent years. The wave direction and vibration direction in Example 1 (2005 national voluntary national vol. III) A series of harmonic shear waves propagated on the x-axis. The waveform at a certain moment is shown in Figure 1 (solid line), and a, b, and c are three elements. (a) The wave propagates in the positive direction of the x-axis.