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![]() "Jim" wrote in message ... OK! i have read this whole thread, so who won? Among physicists 'no ether' won. 'ether' is an over extended analogy of acoustic waves. The role of a medium in acoustic waves is easily and relatively directly perceivable. That gets added to one's "common sense" and then the analogy is made to EM waves. But if one goes beyond just making the analogy and actually tries to measure this 'ether' it disappears, is contradictory, and/or is superfluous. i am not trying to stir it up again. But it may serve to do so. ![]() i want to know what is the latest and/or best theory! (i do The wiki page is pretty good. http://en.wikipedia.org/wiki/Luminiferous_aether "today the aether is considered to be a superseded scientific theory" "... the mechanical qualities of the aether had become more and more magical: it had to be a fluid in order to fill space, but one that was millions of times more rigid than steel in order to support the high frequencies of light waves. It also had to be massless and without viscosity, otherwise it would visibly affect the orbits of planets. Additionally it appeared it had to be completely transparent, non-dispersive, incompressible, and continuous at a very small scale." "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. A range of proposed aether-dragging theories could explain the null result but these were more complex, and tended to use arbitrary-looking coefficients and physical assumptions. Lorentz and Fitzgerald offered a more elegant solution to how the motion of an absolute aether could be undetectable (length contraction), but if their equations were correct, the new special theory of relativity (1905) could generate the same mathematics without referring to an aether at all. Aether fell to Occam's Razor." "Today, the majority of physicists hold that there is no need to imagine that a medium for light propagation exists. They believe that neither Einstein's general theory of relativity nor quantum mechanics have need for it and that there is no evidence for it. As such, a classical aether is an unnecessary addition to physics that violates the principle of Occam's razor." think that theory is the term because i have not seen proof either way) who is in charge of the last word? i previously understood that radio was a magnetic electromagnetic force, a subatomic energy similar to gravity. and like gravity, its not yet completely understood. (we dont need to understand it to detect, measure or use it) magnetic energy has a spectrum from gravity Gravity is something else. Physicists have been trying to link gravity to the other forces of nature (electro-weak and strong nuclear) but have not succeeded. through radio into light and who knows how far beyond. the particular qualities of this energy depends upon its frequency or position relative to the spectrum. now one guy is arguing on the existence of either, or a medium to propagate the waves. this seems true at one end of the spectrum. the other guy argues on photons or little energy packets that transverse distance like particles do. Photons are photons regardless of which end of the spectrum one is talking about. At the low end they have very low energy and one needs of lots of them in order to detect them. They are also 'longer'. this also seems true at the OTHER end of the spectrum. where are we on the spectrum NOW? e l f radio is radio but it works very much like a magnetic force. e h f is also radio. radio at gigahz frequencies and above is starting to exhibit properties of light. so where the hell are we talking about on the e m spectrum and how the hell does my antenna work? SOMEBODY here HAS to be the one with the highest education! what are YOUR qualifications and then what is YOUR opinion? -- rb |
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