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Discussion and Debate
Discussion and Debate
Physical & Life Sciences
Time Dilation and the Speed of Light
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<blockquote data-quote="Ygrene Imref" data-source="post: 71430274" data-attributes="member: 395531"><p>The speed of light is "1" in natural units because the meter is described as the distance light travels in a certain amount of time. It "turns out" light travels one meter in one third of one ten millionths of a second.</p><p></p><p>Fine.</p><p></p><p>This figure, then, means that in about 300,000,000 seconds, we get "c." That is a constant; it doesn't necessarily mean we can't have tachyons along with bradyons. It just means in the media chosen it is measured that a photon has a speed of "1".</p><p></p><p>Also, recall that speed is not velocity, and that any component of the velocity can be greater than "c," or even complex. If <strong>v </strong>= c•[0, (<strong>√</strong>5/2), i(1/<strong>√</strong>4)] then the speed is "c." But, <strong>v </strong>is greater than "c" in one coordinate. This is related to phase and velocity, where the actual wave packets can travel faster than the speed of light for a specific medium. The "speed" of light is allegedly constant, while the energy is stored in the momentum and frequency of the photon so that there is no change in the speed limit, but the phase velocity can increase beyond "c" for high frequencies.</p><p></p><p>The Cherenkov effect is an example of FTL travel in a medium. Photons incident upon deuterium slow, and because of the density of heavy water the speed of light in deuterium is about 3/4 that of "c." But, neutrinos can already travel relativistically, and they allegedly do not interact with much matter (very LOW cross section, very high mean free path) so the speed of the neutrino is actually faster than "0.75c" - the speed of light in deuterium. Because of this, <strong>the neutrino breaks the light barrier, and gives off a "photonic boom" of blue light. </strong></p><p></p><p>The neutrino speed magnitude is still smaller than "c" in a vacuum - the alleged speed limit of a photon.</p><p></p><p></p><p></p><p>I happen to be of the camp that purports E = mc^2, and E^2 = (mc^2)^2 + (pc)^2 is heavily flawed, and that there is no "limit" to how fast elementary particles can travel in any medium. Field theory is trying to reconcile the suspicious aspects of SR, and QM. This implies Maxwells Equations would need to be altered - which isn't too farfetched seeing as though the equations beg to be mathematically coupled (but, no monopoles exist, allegedly.)</p></blockquote><p></p>
[QUOTE="Ygrene Imref, post: 71430274, member: 395531"] The speed of light is "1" in natural units because the meter is described as the distance light travels in a certain amount of time. It "turns out" light travels one meter in one third of one ten millionths of a second. Fine. This figure, then, means that in about 300,000,000 seconds, we get "c." That is a constant; it doesn't necessarily mean we can't have tachyons along with bradyons. It just means in the media chosen it is measured that a photon has a speed of "1". Also, recall that speed is not velocity, and that any component of the velocity can be greater than "c," or even complex. If [B]v [/B]= c•[0, ([B]√[/B]5/2), i(1/[B]√[/B]4)] then the speed is "c." But, [B]v [/B]is greater than "c" in one coordinate. This is related to phase and velocity, where the actual wave packets can travel faster than the speed of light for a specific medium. The "speed" of light is allegedly constant, while the energy is stored in the momentum and frequency of the photon so that there is no change in the speed limit, but the phase velocity can increase beyond "c" for high frequencies. The Cherenkov effect is an example of FTL travel in a medium. Photons incident upon deuterium slow, and because of the density of heavy water the speed of light in deuterium is about 3/4 that of "c." But, neutrinos can already travel relativistically, and they allegedly do not interact with much matter (very LOW cross section, very high mean free path) so the speed of the neutrino is actually faster than "0.75c" - the speed of light in deuterium. Because of this, [B]the neutrino breaks the light barrier, and gives off a "photonic boom" of blue light. [/B] The neutrino speed magnitude is still smaller than "c" in a vacuum - the alleged speed limit of a photon. I happen to be of the camp that purports E = mc^2, and E^2 = (mc^2)^2 + (pc)^2 is heavily flawed, and that there is no "limit" to how fast elementary particles can travel in any medium. Field theory is trying to reconcile the suspicious aspects of SR, and QM. This implies Maxwells Equations would need to be altered - which isn't too farfetched seeing as though the equations beg to be mathematically coupled (but, no monopoles exist, allegedly.) [/QUOTE]
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