I am confused over this one...my textbook says that wave speed is the speed with which the wavefront travels which, to me, seems like they are the same thing but their definition looks different, to me.
Wavefront: A wavefront is a surface where all of the particles are vibrating in the same phase.
Wave: The disturbance which transfers energy through matter in space.
Does this mean that wavelets in wavefronts are the matter which transfer energy in space and hence cause wave disturbances according to these definitions? Can somebody help me with how should I relate these two definitions.
P.S-All definitions are from my school textbook.