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“波的干涉”在近代物理中占有很重要的地位。为了适应现代科技的发展,“波的干涉”教学必须达到一定的深度,只要扎扎实实把概念讲深讲透,学生对干涉的理解就可以达到应有的高度。基于这一想法,本人在讲授该节内容时,设计了一套系列教学思考题。实践证明,这样来讨论“波的干涉”。效果良好。一、引入新课图1表示一列横波在某时刻的波形图线。指出:A、B、C、D、E、F、G各质点,哪些质点的振动同相?哪些质点的振动反相?[复习“同相”与“反相”的概念] 2.设法在一条橡皮筋的两端各产生一个分别向右和向左传播且振幅和频率都相同的横波(如图2)。问:
The “wave interference” plays an important role in modern physics. In order to adapt to the development of modern science and technology, “wave interference” teaching must reach a certain depth, as long as a solid and thorough understanding of the concept, students’ understanding of interference can reach the height it deserves. Based on this idea, I designed a series of teaching and thinking questions when teaching the content of this section. Practice has proved that this way to discuss “wave interference ”. The effect is good. First, the introduction of new courses Figure 1 shows a row of transverse waves at a certain moment in the waveform diagram. Point out: A, B, C, D, E, F, G particles, which particles are in phase with the vibration? Which particles have vibration inversion? [Review “in phase” and “inverse” concept] 2. Try to produce a transverse wave that travels to the right and left, both at the same amplitude and frequency, at each end of a rubber band (Figure 2). ask: