How many known types of waves are there?
Examples of waves include: * Ocean surface waves, which are perturbations that propagate through water. * Radio waves, microwaves, infrared rays, visible light, ultraviolet rays, x-rays, and gamma rays make up electromagnetic radiation. In this case, propagation is possible without a medium, through vacuum. These electromagnetic waves travel at 299,792,458 m/s in a vacuum. * Sound — a mechanical wave that propagates through air, liquid or solids. * Waves of traffic (that is, propagation of different densities of motor vehicles, etc.) — these can be modelled as kinematic waves, as first presented by Sir M. J. Lighthill * Seismic waves in earthquakes, of which there are three types, called S, P, and L. * Gravitational waves, which are fluctuations in the curvature of spacetime predicted by general Relativity. These waves are nonlinear, and have yet to be observed empirically. * Inertial waves, which occur in rotating fluids and are restored by the Coriolis effect. I don’t know of there’s
