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Topic: Luminiferous aether


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In the News (Fri 25 Dec 09)

  
  Luminiferous aether
In the late 19th century luminiferous aether ("light-bearing aether") was the term used to describe a medium for the propagation of light.
This was initially interpreted to mean that the medium drags the aether along, with a portion of the medium's velocity, but that understanding was rejected after Wilhelm Veltmann demonstrated that the index n in Fresnel's formula depended upon the wavelength of light (so that the aether could not be moving at a wavelength-independent speed).
Aether theory was dealt another blow when the Galilean transformation and Newtonian dynamics were both modified by Albert Einstein's special theory of relativity, giving the mathematics of Lorentzian electrodynamics a new, "non-aether" context.
www.brainyencyclopedia.com /encyclopedia/l/lu/luminiferous_aether.html   (3666 words)

  
  Luminiferous aether - Wikipedia, the free encyclopedia
In the late 19th century luminiferous aether ("light-bearing aether") was the term used to describe a medium for the propagation of light.
This was initially interpreted to mean that the medium drags the aether along, with a portion of the medium's velocity, but that understanding was rejected after Wilhelm Veltmann demonstrated that the index n in Fresnel's formula depended upon the wavelength of light (so that the aether could not be moving at a wavelength-independent speed).
Aether theory was dealt another blow when the Galilean transformation and Newtonian dynamics were both modified by Albert Einstein's special theory of relativity, giving the mathematics of Lorentzian electrodynamics a new, "non-aether" context.
en.wikipedia.org /wiki/Luminiferous_aether   (3893 words)

  
 Luminiferous aether - Wikipedia   (Site not responding. Last check: 2007-10-26)
In the late 19th century the luminiferous aether ("light-bearing aether") was invoked as the medium for the propagation of light, when it was discovered, from Maxwell's equations, that light is an electromagnetic wave.
Aether was thought to be a fluid which was transparent, undispersive, incompressible, continuous, and without viscosity.
However, this theory required that matter moving through the aether should modify the velocity of the aether and that because of dispersion the relative velocity of medium and aether would be different for different wavelengths, thus requiring a different aether for each wavelength of light.
wikipedia.findthelinks.com /lu/Luminiferous_aether.html   (597 words)

  
 AETHER - LoveToKnow Article on AETHER   (Site not responding. Last check: 2007-10-26)
Aethers were invented for the planets to swim in, to constitute electric atmospheres and magnetic effluvia, to convey sensations from one part of our bodies to another, and so on, till all space had been filled three or four times over with aethers.
This result is inconsistent with the aether remaining at rest, unless we assume that the dimensions of the moving system depend, though to an extent so small as to be not otherwise detectable, on its orientation with regard to the aether that is streaming through it.
The aether is taken to be at rest; and the strain-forms belonging to the atoms are the electric fields of the intrinsic charges, or electrones, involved in their constitution.
68.1911encyclopedia.org /A/AE/AETHER.htm   (4837 words)

  
 Aether: Definition and Links by Encyclopedian.com   (Site not responding. Last check: 2007-10-26)
...Luminiferous aether Luminiferous aether In the late 19th century the luminiferous aether...(light-bearing aether) was invoked as the medium for the propagation of light, when it was...
See also luminiferous aether for the late 19th century invocation of this concept by physicists as an attempt to reconcile electromagnetic theory and Newtonian physics.
Aether ("upper air"), in Greek mythology, was the personification of the "upper sky", space and heaven.
www.encyclopedian.com /ae/Aether.html   (320 words)

  
 Aether - Wikipedia, the free encyclopedia
The Aether of classical elements is a concept, historically, used in science (as a medium) and in philosophy (as a substance).
Luminiferous aether, in early physics considered to be the medium through which light propagates
Etheric plane (esotericism), a finer grade of matter (aether) - in addition to the solids, liquids, and gases - which permeates the subatomic structure of the earth and its atmosphere.
en.wikipedia.org /wiki/Aether   (239 words)

  
 Luminiferous aether   (Site not responding. Last check: 2007-10-26)
In the late 19th century the luminiferous aether ("light-bearing aether ") or ether was postulated to be the medium the propagation of light.
Aether was to be a fluid which was transparent non-dispersive incompressible continuous and without viscosity.
The key difficulty with the aether hypothesis from the juxtaposition of the two well-established of non-relativistic Newtonian dynamics and of Maxwell's Under a Galilean transformation the equations of Newtonian dynamics are invariant whereas those of electromagnetism are not.
www.freeglossary.com /Luminiferous_aether   (1264 words)

  
 EncyclopediaNomadica Aether < AethMetry < TWiki
In 19th century physics, the positing of a luminiferous aether was used to reconcile Maxwell's electromagnetic theory and Newtonian mechanics.
The first attempt at a theory of the dynamic Aether was Nikola Tesla's hypothesis that propagation of electric signals was distinct from the generation of electromagnetic signals, and made the latter possible.
Aspden's model of a dynamic Aether invokes the existence of a near-balanced continuum of cosmological charge populated by 'Aether particles', the quons, that are capable of condensing ordinary electron-positron pairs and are not subject to the constraints of Relativity (hence, are massless-like).
www.encyclopedianomadica.org /bin/view/AethMetry/Aether   (2288 words)

  
 Michelson-Morley experiment
They reasoned that, if the luminiferous aether was real, the Earth would at all times be moving through it like a plane through the air, and producing a detectable "aether wind".
The effect of the aether wind on light waves would be like the effect of a strong current in a river on a swimmer, moving at a constant speed, back and forth between two points.
Similarly, the effect of an "aether wind" would be that it would take slightly longer for a beam of light to travel round-trip in the direction parallel to the aether wind than it would for a beam of light to travel the exact same round-trip distance at right angles to the wind.
www.ebroadcast.com.au /lookup/encyclopedia/mi/Michelson-Morley_experiment.html   (880 words)

  
 Luminiferous aether Encyclopedia   (Site not responding. Last check: 2007-10-26)
luminiferous aether ("light-bearing aether") was the term used to describe a medium for the propagation of light.
The word "aether" stems via Latin from the Greek αἰθήρ, from a root meaning "to kindle/burn/shine", which signified the substance thought in ancient times to fill the upper regions of space, beyond the clouds.
By the early 20th Century, aether theory was in trouble: A series of increasingly complex experiments had been carried out in the late 1800s to try to detect the motion of earth through the aether, and had failed to do so.
www.hallencyclopedia.com /topic/Luminiferous_aether.html   (4817 words)

  
 Aether - The Mind-N-Magick Paganpedia
Aether (also spelled ether), the Void, is a concept, historically, used in science (as a medium) and in philosophy (as a substance).
The difficulties in reconciling experiments and the theory of the luminiferous aether (a derivative of the aether as concieved by the Greeks) was sidestepped by Albert Einstein's theory.
The need for the luminiferous aether later was removed by the theory of relativity.
paganpedia.mind-n-magick.com /wiki/index.php?title=Ether   (485 words)

  
 Aether - Free Encyclopedia of Thelema
Among these characteristics, the aether had a non-material property, was "less than the vehicle of visible light", and was responsible for "generating metals" along with fostering the development of all bodies.
The luminiferous aether of the more well known 19th century invocation was a concept held by some physicists and was an attempt to reconcile electromagnetic theory and Newtonian physics.
The aether was also known as Zeus defensive wall; the bound that locked Tartaros from the cosmos.
www.egnu.org /thelema/index.php/Aether   (574 words)

  
 Physics > Luminiferous Aether
In the late 19th century the luminiferous aether ("light-bearing aether") was invoked as the medium for the propagation of light, when it was discovered, from Maxwell's equations, that light is an electromagnetic wave.
However, this theory required that matter moving through the aether should modify the velocity of the aether and that because of dispersion the relative velocity of medium and aether would be different for different wavelengths, thus requiring a different aether for each wavelength of light.
The key difficulty with the Aether hypothesis arose from the juxtaposition of the two well-established theories of non-relativistic Newtonian dynamics and of Maxwell's electromagnetism.
www.physics.teleactivities.net /theories/fringe/luminiferous_aether.html   (1045 words)

  
 Luminiferous aether - Wikipedia, the free encyclopedia
In the late 19th century the luminiferous aether ("light-bearing aether"), or ether, was a substance postulated to be the medium for the propagation of light.
By the early 20th Century, aether theory was in trouble: A series of increasingly complex experiments had been carried out in the late 1800s to try to detect the motion of earth through the aether, and had failed.
But by this time, people were increasingly associating the term "aether theory" with discredited and superceded theories predating special relativity, and modern theorists now tend to prefer talking about their work in terms of the expected properties of "the metric", "space" or "vacuum", rather than those of "the aether" or "the medium".
alcor.concordia.ca /~vpetkov/courses/Luminiferous_aether.html   (3987 words)

  
 Luminiferous aether - ExampleProblems.com
In the late 19th century the luminiferous aether ("light-bearing aether"), or ether, was a substance postulated to be the medium for the propagation of light.
By the early 20th Century, aether theory was in trouble: A series of increasingly complex experiments had been carried out in the late 1800s to try to detect the motion of earth through the aether, and had failed.
But by this time, people were increasingly associating the term "aether theory" with discredited and superceded theories predating special relativity, and modern theorists now tend to prefer talking about their work in terms of the expected properties of "the metric", "space", or "vacuum", rather than those of "the aether" or "the medium".
www.exampleproblems.com /wiki/index.php/Luminiferous_aether   (3191 words)

  
 Luminiferous aether - Japan   (Site not responding. Last check: 2007-10-26)
In the late 19th century luminiferous aether ("light-bearing aether") was the term used to describe a medium for &#x74;he propagation of light.
By the early 20th Century, aether theory was in trouble: A series of increasingly complex experiments had been carried out in the late 1800s to try to detect the motion of earth through the aether, and had failed to do so.
Aether theory was dealt another blow when &#x74;he Galilean transformation and Newtonian dynamics were both modified by Albert Einstein's special theory of relativity, giving the mathematics of Lorentzian electrodynamics a new, "non-aether" context.
luminiferous-aether.zdnet.co.za /zdnet/Luminiferous_aether   (4808 words)

  
 Aether - Article from FactBug.org - the fast Wikipedia mirror site
In 19th century physics, the positing of a luminiferous aether was used to reconcile electromagnetic theory and Newtonian physics.
By the early 20th century, though, attempts to detect the aether (or, more specifically, attempts to detect the planet's movement through the aether) had called the concept into doubt, and it was formally dispensed of by the work of Albert Einstein.
Aether may also refer to the fictional planet which is the setting for Retro Studios' for the Nintendo GameCube.
www.factbug.org /cgi-bin/a.cgi?a=2449   (659 words)

  
 Ether, aether,luminiferous ether,ether drift,ether drag,ether filling space,speed of light,medium of light,James ...
The story of ether, or aether, is familar to anyone who has studied the history of science and the seminal tale from the heroic age of physics of the Michelson-Morley experiment to establish whether or not light travels through a mysterious medium that fills space -- the ether.
In the period 1850-1920 when the topic was current in physics and used regularly by physicists such as Sir Oliver Lodge, Michael Faraday, Nicola Tesla, Michelson and Morley, and even by Einstein, the term was spelled 'ether'.
On the face of it, the use of this spelling was to avoid confusion with the anaesthetic fluid ether.
www.alternativescience.com /ether.htm   (2740 words)

  
 Luminiferous aether   (Site not responding. Last check: 2007-10-26)
In the late 19th century the luminiferous aether ("light-bearing aether"), or ether, was postulated to be the medium for the propagation of light.
To account for the apparent incompatibility between this and the free movement of the planets, Stokes suggested that the aether might be (by analogy with pitch) rigid at very high frequencies and fluid at lower speeds.
Although the vast majority of modern scientists reject all aether-based theories, the aether's mystic appeal continues to draw pseudoscientific proponents and protoscientific aspirants.
www.aseannewsnetwork.de /articles/content/l/lu/luminiferous_aether.html   (1084 words)

  
 Luminiferous aether: Facts and details from Encyclopedia Topic   (Site not responding. Last check: 2007-10-26)
A conceptually different experiment that also attempted to detect the motion of the aether was the 1903 Trouton-Noble experiment The trouton-noble experiment attempted to detect motion of the earth through the luminiferous aether, and was conducted in 1901-1903 by frederick thomas trouton (who also developed the troutons...
Much like aether, it picks a privileged reference frame and is therefore incompatible with Lorentz invariance Lorentz covariance is a term in physics for the property of space time, that in two different frames of reference, located at the same event in spacetime but moving relative to each other, all non-gravitational...
Aether drag hypothesis The aether drag hypothesis was an early attempt to explain the way experiments such as aragos experiment showed that the speed of light is constant....
www.absoluteastronomy.com /l/luminiferous_aether   (4761 words)

  
 Wikinfo | Luminiferous aether   (Site not responding. Last check: 2007-10-26)
Modern analysis of aether must be consistent with all of the experiments testing phenomena.
It consists of a modified aether theory and a slight departure from the Contraction Hypothesis.
Harold Aspden's crystalline theory of the aether -- originally appeared in the late 1950s and is relatively well thought out.
www.wikinfo.org /wiki.php?title=Luminiferous_aether   (1689 words)

  
 Wikinfo | Aether
The term aether is used to describe a hypothetical non material substance that remains even when space is devoid of all matter.
In physics and philosophy the term aether is used to describe a hypothetical substance that fills all of space.
Aether was also called "Quintessence." Oliver Nicholson points out that the older concept the aether (in contrast to the more well known luminiferous aether of the 19th century) had three properties.
www.wikinfo.org /wiki.php?title=Aether   (676 words)

  
 Energy and Form
The aether medium was thus a virtual site of cultural allegoresis serving as an ideological screen for the anticipatory or hallucinatory projection of the communication technologies that would unfold from the radio waves Heinrich Hertz discovered by extrapolating from Maxwell’s equations for the electromagnetic aether.
The late-classical doctrine of the aether was a conceptual preparation for the theory of general relativity and for the technologies of wireless radio and television transmissions.
He adapts the phonograph to the aether of space, analogizing the rotation of the audio cylinder to the revolution of the earth in its orbit, which orb then becomes both the needle plying the aether grooves and the informatic datum manifested by the vibratory registration of those indentations on the membrane of matter.
www.stanford.edu /dept/HPS/WritingScience/Clarkepaper.html   (2982 words)

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