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机械波概念的抽象性,传播方向的双向性,波的图象的周期性及振动图象与波的图象之间的相互干扰,造成了波动问题的复杂性,在解题时,如充分利用图象可增强直观性,加深对波的理解,从而迅速准确地求解。下面举例说明波的图象在解题中应用的几种类型。一、根据波的传播方向确定各质点的振动方向已知t时刻波的图象和波的传播方向时,先将波沿着传播方向向前平移Δx,得到t+Δt时刻的波的图象。根据波传
The abstraction of the concept of mechanical wave, the bidirectional nature of the direction of propagation, the periodicity of the image of the wave and the mutual interference between the image of the vibration and the wave have caused the complexity of the wave problem. When solving the problem, The image enhances the intuitiveness and deepens the understanding of the wave so that it can be solved quickly and accurately. The following examples illustrate the wave image in the problem-solving application of several types. First, according to the direction of wave propagation to determine the vibration direction of each particle At known time t wave image and the wave propagation direction, the first wave along the propagation direction of the forward shift Δx, t + Δt moment of the wave image . According to the wave