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波是一种重要而普遍的运动形式,也是高中物理的一个难点,由于比较抽象,学生理解起来比较困难,常常会产生一些误解,甚至有的参考资料中也会出现类似问题。归纳起来,主要表现在两个方面,本文就这两个误解作些剖析,以便学生不再犯类似错误。误解1 在纵波中。正(负)位移最大的质点所在的位置是质点分布最疏的地方(即疏部中心),负(正)位移最大的质点所在的位置是质点分布最密的地方(即密部中心)。
Wave is an important and universal form of exercise, and it is also a difficult point in high school physics. Because it is more abstract, students are more difficult to understand and often produce some misunderstandings. Even in some reference materials, similar problems may arise. To sum up, the main performance in two aspects, this article on the two misunderstandings to make some analysis, so that students no longer make similar mistakes. Misunderstanding 1 In longitudinal waves. The position where the positive (negative) displacement is the largest is the point where the particle distribution is the most sparse (ie the center of the sparse part), and the position where the particle with the largest negative (positive) displacement is located is the place where the particle distribution is the densest (ie the center of the dense part).