FACTOID # 18: Alaska spends more money per capita on elementary and secondary education than any other state.

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Encyclopedia > Wave propagation

Wave propagation refers to the ways waves travel through a medium (waveguide). A transmission medium is any material substance, such as fiber-optic cable, twisted-wire pair, coaxial cable, dielectric-slab waveguide, water, or air, that can be used for the propagation of signals, usually in the form of modulated radio, light, or acoustic waves, from one point to another. ... A waveguide is a structure which guides waves, such as electromagnetic waves, light, or sound waves. ...

With respect to the direction of the oscillation relative to the propagation direction, we can distinguish between longitudinal wave and transverse waves. Longitudinal waves, also referred to as compressional waves or pressure waves, are waves that have vibrations along or parallel to their direction of travel. ... A light wave is an example of a transverse wave. ...

Another useful parameter for describing the propagation is the wave velocity that mostly depends on some kind of density of the medium. Wave velocity is a general concept, of various kinds of wave velocities, for an electromagnetic waves phase and speed concerning energy (and information) propagation. ... Density (symbol: Ï - Greek: rho) is a measure of mass per unit of volume. ...

For electromagnetic waves, propagation may occur in a vacuum as well as in a material medium. Electromagnetic radiation is a propagating wave in space with electric and magnetic components. ...

See also: photon, polarization, antenna theory, propagation In physics, the photon (from Greek Ï†Ï‰Ï‚, phÅs, meaning light) is the quantum of the electromagnetic field; for instance, light. ... In electrodynamics, polarization (also spelled polarisation) is a property of waves, such as light and other electromagnetic radiation. ... A yagi antenna Most simply, an antenna is an electronic component designed to send or receive radio waves. ... The word propagation can mean: Multiplication or increase, as by natural reproduction. ...

Results from FactBites:

 Aerodynamics, Acoustics, Shock Waves Propagation (865 words) Radiation of waves from a source occur at a characteristic speed (speed of sound), that is a function of the thermodynamic properties of the air. Wave propagation is limited by the walls, and is generally one-dimensional (except for those cases in which the walls interact elastically with the waves). Acoustic waves propagate at a constant speed, and the flow of acoustic energy is independent of the duct section (contrary to the progagation of a blast).
 Wave equation - Wikipedia, the free encyclopedia (859 words) The wave equation is an important partial differential equation which generally describes all kinds of waves, such as sound waves, light waves and water waves. The basic wave equation is a linear differential equation which means that the amplitude of two waves interacting is simply the sum of the waves. The elastic wave equation in three dimensions describes the propagation of waves in an isotropic homogeneous elastic medium.
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