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Group Velocity       Article     History   Tree Map
  Encyclopedia of Keywords > Phase Velocity > Group Velocity   Michael Charnine

Keywords and Sections
WAVE PROPAGATION
FUNCTION
POSITIVE
ENERGY
PARTICLE
POLARIZATION
OPTICAL FIBERS
NEGATIVE VALUES
DISPERSION
VELOCITY
PHASE VELOCITY
GROUP VELOCITY
Review of Short Phrases and Links

    This Review contains major "Group Velocity"- related terms, short phrases and links grouped together in the form of Encyclopedia article.

Definitions

  1. The group velocity is the rate that the envelope of the waveform is propagating; that is, the rate of variation of the amplitude of the waveform. (Web site)
  2. The group velocity is often thought of as the velocity at which energy or information is conveyed along a wave.
  3. Note: The group velocity is the velocity of information propagation and, loosely, of energy propagation. (Web site)

Wave Propagation

  1. Wave propagation and group velocity.

Function

  1. The group velocity itself is usually a function of the wave's frequency. (Web site)

Positive

  1. In matter, the group velocity of light pulses can be zero, positive, negative or in nite.

Energy

  1. The polariton propagation speed v equals its group velocity, which is the derivative of the energy with respect to momentum. (Web site)

Particle

  1. A quark must necessarily exist with some other particle in order to have a phase velocity different than that of the group velocity. (Web site)

Polarization

  1. PMD is something that happens in birefringent fibers, where the group velocity is a function of the state of polarization (see Figure 4). (Web site)

Optical Fibers

  1. In optical fibers both the propagation constant and the group velocity depend on the wavelength of the light and the state of polarization. (Web site)

Negative Values

  1. Therefore, negative values of the group velocity will occur in these areas.

Dispersion

  1. The result of group velocity dispersion, whether negative or positive, is ultimately temporal spreading of the pulse.
  2. This "group velocity dispersion" is an important effect in the propagation of signals through optical fibers and in the design of short pulse lasers.
  3. When the dispersion is anomalous, however, group velocity is no longer an indicator of signal velocity.

Velocity

  1. If a particle moves through the ZPE with a velocity, v, it can be shown that v is also the group velocity of the matter wave.
  2. The velocity at which a pulse (or a group of sine waves) travels along the fiber is called the group velocity. (Web site)

Phase Velocity

  1. If ω is directly proportional to k, then the group velocity is exactly equal to the phase velocity.
  2. The relation between wavelength and frequency is the same as in quantum mechanics so the group velocity is twice the phase velocity.

Group Velocity

  1. The group velocity v g is often thought of as the velocity at which energy or information is conveyed along the wave. (Web site)
  2. This is not the same as the group velocity of the wave, which is the rate that changes in amplitude (known as the envelope of the wave) will propagate.
  3. In most cases this is true, and the group velocity can be thought of as the signal velocity of the waveform. (Web site)

Categories

  1. Phase Velocity
  2. Waveform
  3. Wave Propagation
  4. Senses > Hearing > Sound > Amplitude
  5. Exactly Equal
  6. Books about "Group Velocity" in Amazon.com

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  Short phrases about "Group Velocity"
  Originally created: December 16, 2007.
  Links checked: April 26, 2013.
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