Any wave is an oscillation.May fluctuate fluid, electromagnetic field, or any other medium.In everyday life, everyone faces daily with one or another manifestation of hesitation.But what is the standing wave?
Imagine a large container into which water is poured - it could be a bowl, bucket or tub.If now in fluid slapped, then the center of the collision will run on all sides undulating ridges.By the way, they are called - traveling waves.Their characteristic feature - the energy transfer.However, changing the frequency of clapping, you can achieve almost complete visibility of their disappearance.There is an impression that the mass of water becomes gelatinous, and the motion is only up and down.Standing Wave - that is a given displacement.This phenomenon occurs because each pushed from the center of strike wave reaches the walls of the container, and is reflected back, which intersects (interfere) with the major waves traveling in the opposite direction.A standing wave will appear only if the reflected and direct the same phase but different amplitude.Otherwise, the above interference does not occur because one of the properties of wave disturbances with different characteristics - the ability to co-exist in the same screen space without distorting each other.It can be argued that the standing wave is the sum of two oppositely directed running, which leads to a drop in their speeds to zero.
Why, in the above example, the water continues to oscillate in a vertical direction?Very simple!In imposing the waves with the same parameters at specific times vibrations reaches its maximum value, called antinodes, while others are completely extinguished (nodes).By varying the frequency of clapping, how can repay the horizontal wave and strengthen the vertical displacement.
standing waves are of interest not only for experts, but also for theorists.In particular, one of the models of the universe states that any material particle is characterized by a particular frequency of vibration (vibration): electron oscillates (jitter), neutrinos, etc. variesFurthermore, in the framework of the hypothesis, suggested that the said vibration - a consequence of the interference of some as yet undiscovered perturbations of the medium.In other words, the authors argue that, where those amazing waves form standing, there is the matter.
No less interesting is the phenomenon of the Schumann Resonance.It is that under certain conditions (none of the proposed hypotheses is not accepted as the only true) in the space between the surface and the bottom of the ionosphere in a standing electromagnetic waves whose frequencies lie in the low and ultra-low ranges (between 7 and 32 hertz).If formed in the gap "surface - ionosphere" wave will round the planet and get into resonance (phase coincidence), it will be able to exist for a long time without decay, samopodderzhivayas.Schumann Resonance is of particular interest because of the frequency of the waves practically coincides with the natural alpha rhythms of the human brain.For example, studies of this phenomenon in Russia engaged not only in physics, but also such a large organization as the "Institute of the Human Brain."
a standing electromagnetic waves draw attention genius inventor Nikola Tesla.It is believed that he could use this phenomenon of wave interference in some of its devices.One of the sources of their appearance in the atmosphere is considered to be a thunderstorm.Electrical discharges excite the electromagnetic field and generate waves.
