纵波的直观分析法杨桂巧（西安高级中学７１０００１）在“机械振动和机械波”一章的教学中，我布置了这样一道练习题：在横波的波峰中央处，质点的动能最；在波谷中央处，质点的动能最；在纵波的疏部中心处，质点的动能最；在纵波的密部中心处，质点的动能最．由于横波... Intuitive Analysis of Longitudinal Waves Yang Guiqiao (Xi’an Senior High School 710001) In the teaching of the chapter “Mechanical Vibration and Mechanical Waves”, I set up such an exercise: in the center of the peak of the transverse wave, the kinetic energy of the particle is the highest; At the center, the kinetic energy of the particle is the most; at the center of the longitudinal part of the longitudinal wave, the kinetic energy of the particle is the most; at the center of the longitudinal part of the longitudinal wave, the kinetic energy of the particle is the highest. Due to the transverse wave...