Waves SVG – change of some set of physical quantities (characteristics of some physical field or material medium), which can move away from the place of its origin, or oscillate within the limited areas of space.
The wave process may have a variety of physical nature: mechanical, chemical (Belousov – Zhabotinsky reaction, catalytic oxidation of various reducing agents with bromic acid HBrO3), electromagnetic (electromagnetic radiation), gravitational (gravitational waves), spin (magnon), probability density (probability current), etc. As a rule, the wave propagation is accompanied by energy transfer, but not by mass transfer.
The diversity of wave processes leads to the fact that no absolute general properties of the waves can be identified. One of the frequently occurring signs of waves is considered to be a close action, manifested in the relationship of perturbations in neighboring points of the medium or field, but in general it may be absent.
Among all variety of Waves SVG allocate some their elementary types which arise in many physical situations because of mathematical similarity describing their physical laws. About these laws speak in such case as about the wave equations. For continuous systems, these are usually differential equations in partial derivatives in the phase space of the system, for environments often reduced to equations linking perturbations at adjacent points through spatial and temporal derivatives of these perturbations. An important special case of waves is the linear waves, for which the superposition principle is valid.
Basically, physical waves do not tolerate matter, but a variant where the wave transport of matter, not only energy, occurs is possible. Such waves are capable of propagating through the absolute emptiness. Examples of such waves are unsteady radiation of gas in vacuum, waves of probability of the electron and other particles, combustion waves, waves of chemical reaction, waves of density of reagents / transport flows.
Waves SVG origin
Waves can be generated in various ways.
Generation by a localized source of oscillation (emitter, antenna).
Spontaneous generation of waves in volume at occurrence of hydrodynamic instability. Such nature may be, for example, the waves on the water at a sufficiently high wind speed blowing above the water surface.
Transition of waves of one type into waves of another type. For example, when electromagnetic waves propagate in a crystal solid body, sound waves can be generated.