论文部分内容阅读
1 问题讨论机械波在介质中传播时,介质质点依次在各自的平衡位置附近作往复振动,对沿一定方向传播的机械波而言,在某一时刻各质点的振动方向是可以唯一地确定的.反之,由某一时刻质点的振动方向,亦可唯一地确定波的传播方向.这表明两者之间存在着密切的联系,但究竟是怎样的联系?许多学生常会感到无能为力.针对这一情况,近几年来,许多杂志刊载了不少文章,介绍有关方法,本文将就质点振动方向与波传播方向之间的必然联系问题作一讨论.
1 Problem Discussion When a mechanical wave propagates in a medium, the media particles sequentially reciprocate around their respective equilibrium positions. For a mechanical wave propagating along a certain direction, the vibration direction of each particle at a certain moment can be uniquely determined. The vibration direction of a particle at a certain moment can also uniquely determine the direction of wave propagation. This shows that there is a close relationship between the two. However, what is the connection? Many students often feel powerless. In view of this situation, In recent years, many magazines have published many articles and introduced relevant methods. This article will discuss the inevitable relationship between the vibration direction of particles and the direction of wave propagation.