英语翻译A longitudinal wave causes the particles of a medium to
英语翻译
A longitudinal wave causes the particles of a medium to move parallel to the direction of the wave.Figure 15-2b shows a longitudinal wave .Note that the motion of the spring is parallel to the direction in which the wave is moving .Thus the difference between transverse and longitudinal waves is apparent.A sound wave is an example of a longitudinal wave.