Waves cause little overall displacement of their medium unless the disturbances become unusually large. For example, water waves travel horizontally across the surface of the water, but usually almost all the motion of the water itself is vertical. In physics, a field is a region of space in which a particular kind of force can be felt. For example, a magnetic field is a region in which the force of magnetism can be felt. A magnet produces such a field in the space around itself.
Radio waves are another kind of electromagnetic wave.
These waves can be controlled to carry information. Radio and television broadcasts and cellular telephone messages travel through the air on radio waves. Rope waves travel along the length of the rope and are one-dimensional. Water waves generated by a falling stone form circles that spread out over the surface of the pond. These waves are two-dimensional.