Respuesta :
Types of waves. ... A pulse is a single disturbance while a periodic wave is a continually oscillating motion. There is a close connection between simple harmonic motion and periodic waves; in most periodic waves, the particles in the medium experience simple harmonic motion
It's any wave that repeats over and over and over and over and over and over and over and over and over and over, AND . . .
-- each one has the same shape
-- each one has the same amplitude
-- each one takes the same length of time.