The degree to which a speaker's sound is spread over the listening area.
The spreading and mixing of chemical constituents in groundwater caused by diffusion and mixing due to microscopic variations in velocities within and between pores.
The separation of light into its component colors, as a prism disperses white light into a color band, or a rainbow effect.
A measure of the `power' of a spectrograph. A dimensionless number, typically given in Å mm. This number arises by dividing the true length of a section of an order in the output image (in the dispersion direction) by the wavelength range covered. Also the act of splitting light into its components by wavelength.
The spreading of light waves. Chromatic dispersion refers to the separation of light into its constituent colors, as occurs with a prism. Check out this link to the Glenbrook Physics Classroom for more information on light dispersion.
The separation of white light into its component spectral colors (see fire).
The variation in a lens-element's ability to bend light. Comments & Discussion
The act of distributing particles evenly throughout a medium; The act of separating white light into the component colours of the spectrum; A smooth, homogeneous mixture of ingredients applied to paint.
The process in which radiation is separated into its component wavelengths.
is the colored light reflected from within a diamond; also called "fire".
The separation of a light ray into its component colors (i.e. by a prism).
The variation of refractive index with color (or wavelength) of light. The spreading of white light into its component colors when passing through a glass prism is due to dispersion which, in turn, is due to the fact that the refractive index of transparent substances is lower for long wavelengths than for short wavelengths.
The spreading, or broadening, of light pulses as they travel through the fibre. Dispersion is proportional to length (See Chromatic Dispersion).
(dis-per'-sion) The systematic variation of the index of refraction with color within a substance, due to the fact that white light is composed of a range of wavelengths. Minerals such as diamond with high dispersion are said to have "fire" or the ability to split white light into its respective colors.
the effect of separating waves, especially light, into constituent wavelengths by passing through a medium with an index of refraction that varies with wavelengths.
The cause of bandwidth limitations in a fiber. Dispersion causes a broadening of input pulses along the length of the fiber. Three major types are (1) modal dispersion caused by differential optical path lengths in a multimode fiber; (2) chromatic dispersion caused by a differential delay of various wavelengths of light in a waveguide material; and (3) waveguide dispersion caused by light traveling in both the core and cladding materials in single mode fibers.
The separation of composite light into its various wavelengths as, for example, by a prism or grating.
A process of scattering or separating; specific uses include: Physical Chemistry. a two-phase system consisting of finely divided particles (the disperse phase) distributed throughout a bulk substance (the continuous phase); for example, fog is a dispersion of liquid particles in a gas; paint is a dispersion of solid particles in a liquid. Physics. the separation of a complex wave containing several frequencies into its individual component waves by virtue of different wave speeds. Astrophysics. the slowing down of a radio signal's propagation velocity as it passes through an ionized gas or plasma in the interstellar medium; short frequencies are the least affected and long ones the most affected. Electromagnetism. the scattering of microwave radiation by an obstruction. Mineralogy. the characteristic and specific manner in which a monopaque mineral will refract white light.
The amount of rainbow colors returned to the eye from the diamond.
The fiery, rainbow colors emanating from a diamond as white light is broken-up into colors.
The splitting of white light into the colors of the spectrum. When white light enters a crystal, it splits up; some rays are reflected and some are absorbed, forming the mineral's color. Gemstones are cut in a fashion that the split-up light in the crystal fans out its colors and reflects from an exact face. This causes "fire" in a gem, which is best seen on colorless gems.
In SUTRA, "dispersion" refers specifically to mechanical dispersion, as distinguished from molecular diffusion. Dispersion describes the spreading of solute mass or thermal energy relative to the average advective motion of the fluid; it is the macroscopic (model-scale) representation of the effect of fluid mixing at the microscopic (pore) scale. In SUTRA, the dispersive flux depends linearly on both the concentration/temperature gradient (it is "Fickian") and the magnitude of the fluid velocity. To learn more about the SUTRA dispersion model, see Section 2.5 of the SUTRA documentation and " Visualizing the SUTRA dispersion model in 3D" on the " Special topics" page.
The spreading of light pulses as they travel in a fiber. Often used to refer to chromatic dispersion.
The division of white light into its constituent components as in light through a prism; the rainbow effect.
The fire of a diamond, it is the colored light reflected from the stone.
Spread of the signal delay in an optical waveguide. It consists of various components: modal dispersion, material dispersion, and waveguide dispersion. As a result of its dispersion, an optical waveguide acts as a low- pass filter for the transmitted signals.
The process of separating polychromatic light into its component wavelengths.
Refers to the broadening of a pulse after traveling a distance along the fiber (see modal and chromatic dispersion).
spreading widely or driving off
the act of dispersing or diffusing something; "the dispersion of the troops"; "the diffusion of knowledge"
the spreading of light into a spectrum of color. The variation in the speed of a periodic wave due to its wavelength or frequency
Separation, from white light, of different wavelengths being refracted by different amounts.
Also called “fire.†Sometimes incorrectly confused with “brilliance†and “scintillation.†Dispersion is the colorful result of a gem materialâ€(tm)s ability to differentially refract the various spectral colors of white light somewhat like a prism. The strength of dispersion varies from gem to gem.
change in refractive index with frequency. In normal dispersion, the refractive index increases with frequency. In anomalous dispersion, the refractive index decreases with frequency indicative of energy absorption.
a measure of the angular spread of different wavelengths emerging from a prism or grating. More precisely, the reciprocal dispersion is the rate of change of wavelength with distance across a monochromator exit slit. It has units of nm/mm etc.
Dispersion causes light pulses in a fiber to spread in time. A distinction is made between multimode distortion, material dispersion and fiber dispersion.
the spread of pollutants caused by atmospheric mixing, transportation or turbulence (random fluctuations in wind velocity)
The fiery, rainbow colours emanating from a diamond as white light is broken-up into colours.
The spreading and dilution of a solute front as it moves in the ground water (also called hydrodynamic dispersion). The spreading phenomenon occurs because of mechanical mixing during fluid advection (known as mechanical or hydraulic dispersion) and because of molecular diffusion due to the thermal-kinetic energy of the solute particles. Spreading of the solute in the direction of bulk flow is known as longitudinal dispersion. Spreading in directions perpendicular to the flow is called transverse dispersion. Longitudinal dispersion is usually much stronger than transverse dispersion.
The property of a transparent stone to split light into the seven spectral colors, causing the "fire" which is refracted by the internal facets. Diamond has a very high dispersion, hence its high amount of fire.
The temporal spreading of a pulse in an optical waveguide. May be caused by modal or chromatic effects.
The spread or distribution or coverage of sound generated from a horn or loudspeaker.
The spreading of sound waves as they leave a speaker.
The spreading out of a wave train due to each wave length traveling with its own velocity.
The separation of light into its component colours.
The movement and spreading of contaminants out and down in an aquifer.
The spread of tariffs in a tariff structure.
The spreading of light pulses that takes place in multimode fiber optic transmission. Dispersion limits the potential transmission distance because the spread out light pulses reach the destination at different times making the signal unreadable.
A general term for those phenomena that cause a broadening or spreading of light as it propogates through an optical fiber. The three types are modal, material, and waveguide.
Intensity of the light reflected out of the stone through the crown (see 'Brilliance' and 'Fire').
The effect that properly angled and placed facets have on the diamond's ability to display fire.
to spread or scatter. The separating out of different wavelengths of white light into a spectrum of colours as it passes through a prism or drop of water or similar transparent object.
The spreading of light pulses as they travel down the fiber.
Phenomenon in which the velocity of propagation of an electromagnetic wave is wavelength dependent; Process by which a substance or chemical spreads and dilutes in flowing groundwater or soil gas.
Arranged around the table facet on the crown are several smaller facets (bezel and star facets) angled downward at varying degrees. These facets, and the angles at which they are cut, have been skillfully designed to break up white light as it hits the surface, separating it into its component spectral colors (for example, red, blue and green). This effect, which appears as a play of small flashes of color across the surface of the diamond as it is tilted, is what we refer to as the diamond's dispersion (also called "fire"). This play of color should not be confused with a diamond's natural body color (normally white, though sometimes yellow, brown, pink or blue in the case of fancy color diamonds) which is uniform throughout the entire diamond and is constant, regardless of whether it is being tilted or not.
Dispersion is the ability of a diamond or other gemstone, to differentially refract light of different wavelengths (colours), thereby splitting apparently white light into spectral colours. Fire. Diamond has very high dispersion at 0.044, which is one of the factors making it an ideal gemstone.
The splitting of white light into spectral colors as a result of refraction; Commonly referred to as fire in the trade.
The separation of white light as it separates into colours.
Mechanical mixing of a dissolved chemical as it flows through a solution. Dispersion causes chemicals to spread away from the straight-line pathway into a wider path. Temperature, pressure, and chemical forces in the aquifer drive the process. Diffusion is a special case of dispersion.
The spread of sound over a wide area.
the dependence of wave velocity on the frequency of wave motion; a property of the medium in which the wave is propagated. In the visible region of the electromagnetic spectrum, dispersion manifests itself as the variation of refractive index of a substance with wavelength (colour) of the light. It is on account of its dispersion that a prism is able to form a spectrum.
disperse The way the different colors in the light from a source spread out into a spectrum when the light is refracted through a material like water or glass. To spread light into its component colors or wavelengths. Use the "back" button to return to the lesson.
The separation of white light into its different component wavelengths. I.e. creating a rainbow by passing sunlight through a prism.
The cause of bandwidth limitations in an optical fiber. Dispersion causes a broadening of input pulses along the length of the fiber. Two major types are (a) mode dispersion caused by differential optical path lengths in a multimode fiber, & (b) material dispersion caused by a differential delay of various wavelengths of light in a wave guide material.
(or "fire"). The prism of light refracted from within a finished diamond or stone. The better a diamond or stone is cut or faceted, the more colors are emitted from the stone as it is turned.
the process of separating radiation into various wavelengths
Separation of EMR into its spectral components.
(1) Act of dispersing, or state of being DISPERSED. (2) The separation of WAVES by virtue of their differing rates of travel.
When light enters a diamond it reflects off the facets and the angles cut into the stone. This distribution of light is known as dispersion, or the display of the spectral colors.
This is the splitting up of white light into separate colours. It can be done by passing white light through a prism. Back to top of the page
Separation of a beam of light into its wavelength components, each of which travel at slightly different speeds. Also called chromatic dispersion.
The variation of phase velocity with frequency. In general, any process separating radiation into components having different frequencies, energies, velocities, or other characteristics.
Dispersion (in dispersive media) are complex signals that are distorted because of the various frequency components that make up the signal and have different propagation characteristics and also paths. Because of the finite conductivity of copper, cable or wire media that deals with guided wave transmission is actually fundamentally dispersive. The upper bit rate that a medium can support is limited by dispersion because it distorts the signal waveforms all the way to the extent that transitions coming from one information state to a differnt one cannot actually be reliably detected by the receiving equipment, (for example, logical l logical 0 value changes).
The spreading of sound waves as they leave a source. The spreading of sound waves as they leave a source.
The splitting of light as it enters a gemstone. Also known as the stone's “fire.
The degree of sound that is spread over the listening area.
Flashes of rainbow colors. Also called “fire.
The separation of radiation into its spectral components due to different wavelengths of light traveling at different speeds through a transmissive medium (different indices of refraction). See Equilateral Prisms.
The spreading out of light pulses as they travel in an optical fiber; proportional to length.
Where light rays deviate by different wavelengths, resulting in a light spectrum, or rainbow.
More correctly known as chromatic dispersion. Dispersion results when light of different wavelengths propagates at different velocities down a fiber span. The result is pulse spreading that is a function of length. Total dispersion is measured in units of ps/nm and the dispersion coefficient of a fiber is in units of ps/nm-km, or pico-seconds per nanometer per km of fiber length.
The cause of bandwidth limitation in a fiber. Dispersion causes a broadening or spreading of light as it propagates along the length of the fiber. Three types are: a) mode (modal) dispersion caused by differential optical path lengths in a multimode fiber; b) material dispersion caused by a differential delay of various wavelengths of light in a fiber; and c) waveguide dispersion caused by light traveling in both the core and cladding materials in single mode fibers.
The separation of light into its separate colors.
The result of white light splitting into all the colors of the rainbow.
Variation of the speed of light and therefore the refractive index with wavelength in the same material, resulting in separation of light into its spectrum.
The extent to which data are spread out rather than clustered close to their mean or median.
Also known as a diamond's "fire," the flashes of color caused by the breakup of white light into spectral colors (such as red, blue and green) as it hits a diamond's surface.
The breaking up of an oil slick into small droplets that are mixed into the water column by breaking waves and other sea surface turbulence.
The breakup of a light ray into colors of the spectrum.
The degree of sound spread out over the listening area.
the spreading of light because of the wavelength dependence of the index of refraction
Phenomenon that produces a broadening of input pulses along the length of the fiber, causing signal degradation.
A property of seismic surface waves in which their velocity (as well as their penetration into the subsurface) is dependent on their frequency. The basis of methods such as SASW in which seismic wave velocity is analyzed as a function of wave frequency.
The splitting of white light into its constituent spectral colours-the rainbow colours-when it passes through inclined surfaces, such as those on a prism or faceted gem. Dispersion in gems is called fire.
Dispersion causes a broadening of pulses as they are propagated along an optical fibre, causing limitations in bandwidth.
The prismatic effect of a colorless material splitting white light into its spectrum colors.
The angular separation of the component colored rays of a pencil of light on emerging from a lens.
Or "fire", the rainbow colors seen in a properly cut gemstone.
Dispersion, or fire, is the rainbow prism of light that can reflect from within a finished diamond or stone. The better a diamond or stone is cut or faceted, the more spectral colors are emitted from the stone.
ability of glass to bend light rays of deferent wavelengths to varying degrees.
The cause of bandwidth limitations in a fibre. Dispersion causes a broadening of input pulses along the length of the fibre. Two major types are: mode dispersion caused by differential optical path lengths in a multimode fibre and material dispersion caused by a differential delay of various wavelengths of light in a waveguide material.
Signal distortion caused by a spreading of an optical pulse in time as it propagates along the length of the fiber. Increasing fiber optic transmission speeds are driving increased dispersion effects.
the variation in index of refraction of a material versus wavelength of light.
The property of transparent gemstones to separate white light into the colours of the spectrum. The interval between such colours varies in different gemstones, but in practice it is measure by the difference between the refractive indices of the red and blue rays. Diamond has the highest dispersion (.044) of any natural, colourless gem.
The temporal spreading of a light signal in an optical waveguide caused by light signals traveling at different speeds through a fiber either due to modal or chromatic effects.
separation of wavelength components due to variation in velocity.
The spreading or broadening of light rays as they travel through a fiber optic strand. The fiber property that causes this effect is also called dispersion.
The decrease in concentration of airborne pollutants as they spread throughout an increasing volume of atmosphere.
the splitting of white light into its constituent colours (red, orange, yellow, green, blue, indigo, violet) by refraction.
1. A system consisting of finely divided particles and the medium in which they are distributed. 2. Separation of light into colors by diffraction or refraction. 3. A qualitative © 2001 Celanese Acetate LLC estimation of the separation and uniform distribution of fibers in the liquid during the production of a wet-formed nonwoven fabric.
The refraction of light waves that causes the different frequencies to bend at slightly different angles.
The separation of different color light via refraction.
The spreading of sound waves as it leaves a speaker.
In optics, dispersion is a phenomenon that causes the separation of a wave into spectral components with different wavelengths, due to a dependence of the wave's speed on its wavelength. It is most often described in light waves, but it may happen to any kind of wave that interacts with a medium or can be confined to a waveguide, such as sound waves. Dispersion is sometimes called chromatic dispersion to emphasize its wavelength-dependent nature.
Dispersion of water waves generally refers to frequency dispersion. That is, water, in fluid dynamics, is generally considered to be a dispersive medium; which means that the velocity of the wave front travels as a function of frequency so that spatial and temporal phase properties of the wave propagation are constantly changing. So, for example, waves travelling in water with a longer wavelength and period travel faster than those with a shorter wavelength and period.
