Abstract
Sea waves have a large variety of forms, dimensions and propagation speeds. Their behavior can be modeled with simple undulatory forms, analyzed in terms of period, speeds and gap (wavelength). A wave is in fact a mechanical force which is spread on the surface of contact between two fluids. Waves correspond to periodic deformations of an interface. In oceanography, the waves on the surface are materialized by a deformation of the surface of the sea, i.e. of the interface between the atmosphere and the ocean. During the propagation of a wave from one point towards another, there is no transport of material (the waves do not make advance the boat). The wave transports only energy; a point reached by a wave reproduces the state of the source with a less amplitude and a delay due to the time needed for the wave to traverse the distance which separates it from the source. There are also transverse waves, where the direction of the movement of the water particles is orthogonal with respect to the direction of propagation.
