1. In a wave motion, the disturbance travels through the medium due to repeated periodic oscillations of the particles of the medium about their mean positions.
2. The energy is transferred from one place to another without any actual transfer of the particles of the motion.
3. There is a continuous phase difference between two successive particles because each particle receives disturbance a little later than its preceding particles.
4. The velocity with which a wave travel is different from the velocity of the particles with which they vibrate simple harmonically about their mean positions.
5. In a given medium, the wave velocity remains constant, while the particle velocity changes continuously during its vibration about their mean position.
6. For the propagation of the mechanical wave, the medium must posses the properties of inertia, elasticity as well as a frictions.