dispersion

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dispersion

 [dis-per´zhun]
1. the act of scattering or separating; the condition of being scattered.
2. the incorporation of the particles of one substance into the body of another, comprising solutions, suspensions, and colloid systems.
3. a colloid system, particularly an unstable one.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

dis·per·sion

(dis-pĕr'zhŭn),
1. The act of dispersing or of being dispersed. Synonym(s): dispersal
2. Incorporation of the particles of one substance into the mass of another, including solutions, suspensions, and colloidal dispersions (solutions).
3. Specifically, what is usually called a colloidal solution.
4. The extent or degree in which values of a statistical frequency distribution are scattered about a mean or median value.
[L. dispersio]
Farlex Partner Medical Dictionary © Farlex 2012

dis·per·sion

(dis-pĕr'zhŭn)
1. The act of dispersing or of being dispersed.
2. Incorporation of the particles of one substance into the mass of another, including solutions, suspensions, and colloidal dispersions (solutions).
3. Specifically, what is usually called a colloidal solution
4. The extent or degree to which values of a statistical frequency distribution are scattered about a mean or median value.
[L. dispersio]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

dispersion

the distribution of individual organisms once any DISPERSAL has taken place. For example, organisms may be randomly dispersed, under-dispersed (aggregated) or over-dispersed (as in territorial animals). Dispersion should not be confused with DISTRIBUTION which normally refers to a species as a whole and not to individuals.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005

dispersion

Phenomenon of the change in velocity of propagation of radiation in a medium, as a function of its frequency, which causes a separation of the monochromatic components of a complex radiation. All optical media cause dispersion by virtue of their variation of refractive index with wavelengths. Dispersion is specified by the difference in the refractive index of the medium for two wavelengths. The difference between the blue F (486.1 nm) and the red C (656.3 nm) spectral lines is called the mean dispersion, i.e. nFnC. Dispersion is usually represented by its dispersive power ω or relative dispersion which is equal to the mean dispersion divided by the excess refractive index of the helium d (587.6 nm) spectral line (nd − 1), often called the refractivity of the material,
ω = nFnC/nd − 1
The reciprocal of the dispersive power is called the Abbé's number or constringence (Fig. D8). See aberration longitudinal chromatic; achromatic axis; Fraunhoffer's lines; achromatic prism.
Fig. D8 Dispersion of a white beam of light by a prismenlarge picture
Fig. D8 Dispersion of a white beam of light by a prism
Millodot: Dictionary of Optometry and Visual Science, 7th edition. © 2009 Butterworth-Heinemann

dis·per·sion

(dis-pĕr'zhŭn)
1. Dispersing or being dispersed.
2. Incorporation of the particles of one substance into the mass of another, including solutions, suspensions, and colloidal dispersions (solutions).
3. Specifically, what is usually called a colloidal solution
[L. dispersio]
Medical Dictionary for the Dental Professions © Farlex 2012
References in periodicals archive ?
Makouei, "Modified W-type single-mode optical fiber design with ultralow, flattened chromatic dispersion and ultra-high effective area for high bit rate long haul communications," Progress In Electromagnetics Research C, Vol.
Makouei, "Modified W-type single mode optical fiber design with ultra-low, flattened chromatic dispersion and ultra-high effective area for high bit rate long haul communications," Progress In Electromagnetics Research C, Vol.
Overcoming Chromatic Dispersion Effects in Fiber-Wireless Systems Incorporating External Modulators.
where [beta]([w.sub.c]) = 1/[[upsilon].sub.g], [beta]"([w.sub.c]) = -D[[lambda].sup.2]/2[pi]c, [[upsilon].sub.g] denotes the group velocity, and D is the chromatic dispersion parameter.
Note that for chromatic dispersion (CD) compensation in this system fibre Bragg grating was used and EDFA fixed output power level was equal to 4 dBm according to optimal combined system configuration found out in [9].
(6) Chromatic dispersion: A phenomenon in which different wavelengths are transmitted at different speeds within an optical fiber.
The chromatic dispersion is caused by different time of the spreading wave through fiber for a different wavelength and it depends on the spectral width of the pulse.
Sometimes, other analysis may be done, such as polarization mode dispersion or chromatic dispersion.
The center core shifts chromatic dispersion to achieve a non-zero, low dispersion in the 1550 nm band.
This results from a combination of chromatic dispersion and mode hopping.
The linear impairments usually originate due to chromatic dispersion (CD), fiber loss, and polarization mode dispersion (PMD).