Surface wave

Physical wave*s that move along the boundary between two media.  The energy in these waves propagate along the surface. As the energy moves along the surface, particles of the media travel in a circular motion. The amount of particle movement (amplitude* of the wave) is greatest right at the boundary and decreases with distance from the boundary. Movement of particles penetrates into the material to a distance that is roughly 1/2 the wavelength* of the wave. Deep water ocean waves are an example of surface waves.