Dispersion of Waves

Dispersion of Waves

 

the dependence of the phase velocity of harmonic waves on their frequency. Dispersion is determined by the physical properties of the medium through which the waves are propagating. For example, in a vacuum, electromagnetic waves propagate without dispersion; however, in a material medium, even one as rarefied as the earth’s ionosphere, wave dispersion arises. Ultrasonic waves also exhibit dispersion.

The existence of wave dispersion causes distortion of signals propagated through the medium, since the harmonic waves of various frequencies into which the signal may be broken down propagate at various velocities. The dispersion of light propagating through a transparent prism results in the resolution of white light into a spectrum.

References in periodicals archive ?
We show how the relation of dispersion of waves can be deduced from the previous set of equations in case of an infinite array.
It is well known that the presence of a microstructure leads to the dispersion of waves propagating in the medium.
At this point, it is to be noted that the fiber parameters as well as the operating wavelength are kept unchanged, and the oscillatory behavior of the power pattern may be attributed to the more dispersion of waves happening in the case of higher order modes.