Dispersion may refer to:

In physics:

  • The dependence of wave velocity on frequency or wavelength:
    • Dispersion (optics), for light waves
    • Dispersion (water waves)
    • Acoustic dispersion, for sound waves
    • Dispersion relation, the mathematical description of dispersion in a system
    • Modal dispersion, spreading of signals in multimode fibers and waveguides by a distortion mechanism
      • Polarization mode dispersion, a form of modal dispersion
    • Dielectric dispersion, the dependence of the permittivity of a dielectric material on the frequency of an applied electric field
  • Dispersive mass transfer, in fluid dynamics, the spreading of mass from areas of high to low concentration
    • Atmospheric dispersion modeling, mathematical simulation of how air pollutants disperse in the ambient atmosphere
  • London dispersion force, an instantaneous induced dipole-induced dipole

In other sciences:

  • Biological dispersal, the distribution of animals, spores, fruits and their seeds, etc.
  • Dispersion (chemistry), a system in which particles are dispersed in a continuous phase of a different composition
  • Dispersion (geology), a process whereby sodic soil disperses when exposed to water
  • Dispersion (materials science), the fraction of atoms of a material exposed to the surface
  • Velocity dispersion, the statistical variation of velocities about the mean velocity for a group of astronomical objects

Other uses:

  • Dispersion (finance), a measure for the statistical distribution of portfolio returns
  • Statistical dispersion, a quantifiable variation of measurements of differing members of a population
    • Index of dispersion, a normalized measure of the dispersion of a probability distribution
  • Price dispersion, a variation in prices across sellers of the same item
  • Wage dispersion, the amount of variation in wages encountered in an economy

Famous quotes containing the word dispersion:

    The slogan offers a counterweight to the general dispersion of thought by holding it fast to a single, utterly succinct and unforgettable expression, one which usually inspires men to immediate action. It abolishes reflection: the slogan does not argue, it asserts and commands.
    Johan Huizinga (1872–1945)