|Atlanta's own Archie Punker|
Wednesday, March 21, 2012
In astronomy, superluminal motion is the apparently faster-than-light motion seen in some radio galaxies, quasars and recently also in some galactic sources calledmicroquasars. All of these sources are thought to contain a black hole, responsible for the ejection of mass at high velocities.
When first observed in the early 1980s, superluminal motion was taken to be a piece of evidence against quasars having cosmological distances. Although a few astrophysicists still argue in favor of this view, most believe that apparent velocities greater than the velocity of light are optical illusions and involve no physics incompatible with the theory of special relativity.
1. radiating or reflecting light; shining; bright.
2. lighted up or illuminated; well-lighted: the luminous ballroom.
3. brilliant intellectually; enlightened or enlightening, as a writer or a writer's works: a luminous concept; luminous prose.
4. clear; readily intelligible: a concise, luminous report.
1935’s Einstein, Podolsky, and Rosen Effect, aka The EPR Paradox
The EPR paradox is an early and influential critique leveled against quantum mechanics. Albert Einstein and his colleagues Boris Podolsky and Nathan Rosen (known collectively as EPR) designed a thought experiment intended to reveal what they believed to be inadequacies of quantum mechanics. To that end they pointed to a consequence of quantum mechanics that its supporters had not noticed.
According to quantum mechanics, a single system has its own wave function, its own unitary quantum-theoretical description. If such a single system can be transformed into two individual systems, doing so does not create two wave functions. Instead, theory indicates that each system shares a single wave function.
Tachyon Drives Made Easy
Light speed, c = 3 × 108 meters per second, is the ultimate speed limit of the universe. The well-tested physics orthodoxy of special relativity tells us that nothing can go faster than c. When any massive object with rest mass M (taken to be in energy units) has velocity v=c (or relativistic velocity ß = v/c = 1), the object's mass-energy becomes infinite. This is because the relativistic mass increase factor g = 1/(1 - ß2)1/2 has a zero in its denominator, and the net mass-energy E is given by E =gM. Therefore, it would require all the energy in the universe and more to accelerate the object to a velocity of ß = 1.
If the massive object could somehow be drop-kicked over the light-speed barrier so that v was greater than c, then both g and E would become imaginary quantities (like [-1]½ ) because ß would be larger than 1 and (1 - ß2) would be negative. This, says physics orthodoxy, is Nature's way of telling us that such quantities have nothing to do with our universe, in which all measurable physical variables like E must have real (not imaginary) numbers as values.
A Less Wrong Explanation of Quantum Physics
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