What are the important characteristics of progressive wave?

Explanation

(i) Particles in the medium vibrate about their mean positions with the same amplitude
(ii) The phase of every particle ranges from 0 to `2pi`.
(iii) No particle remains at rest permanetly. Particle remains at rest permanetly. Particles come to the rest position only twice at the extreme points during wave propagation.
(iv) Transverse progressive waves are characterized by crests and troughs whereas longitudinal progressive waves are characterized by compressions and rerefactions.
(v) At the man position the particles always move the same maximum velocity.
(vi) The displacement velocity and acceleration of particles separated from each othher by `nlambda` are the same, where n-an integer , and `lambda`- the wavelength.