increase the velocity of light!!!!
December 17, 2006 11:26am CST
can we increase the speed of light? we know that light has duel cheractor particle and wave.can't we use particle nature to increase the velocity of light.
17 Dec 06
Faster-than-light (also superluminal or FTL) communications and travel refer to the propagation of information or matter faster than the speed of light. This concept is a staple of the science fiction genre, but is generally considered impossible by the mainstream physics community, due to special relativity. Faster-Than-Light travel or communication is problematic in a universe that is consistent with Einstein's theory of relativity. In a hypothetical universe where Newton's laws of motion and the Galilean transformations are exact, rather than approximate, the following would be true: * The laws of physics are the same in every uniformly-moving frame of reference, although some laws would have to include terms containing the velocity of the frame of reference * Quantities measured in different reference frames are related by Galilean transformations, although for some quantities the transformation under the Galilean group is complicated * Velocities add linearly * A fixed point x in one reference frame corresponds to the trajectory x-vt in a frame moving with relative velocity v to the first. * There is nothing fundamental about the wave velocity of light * All observers agree on the time, up to an overall shift * Simultaneity is a well-defined concept in that all observers agree on whether any two events are simultaneous However, according to Einstein's theory of special relativity, what we measure as the speed of light in a vacuum is actually the fundamental physical constant c. This means that all observers, regardless of their acceleration or relative velocity, will always measure zero-mass particles (e.g., gravitons as well as photons) naturally traveling at c. This result means that measurements of time and velocity in different frames are no longer related simply by constant shifts, but are instead related by Poincaré transformations. These transformations have important implications: * Matter becomes more massive as it accelerates, and at the speed of light, an object would have infinite mass. * To accelerate an object of non-zero rest mass to c would require infinite time with any finite acceleration, or infinite acceleration for a finite amount of time * Either way, such acceleration requires infinite energy. Going beyond the speed of light in a homogeneous space would hence require more than infinite energy, which is not a sensible notion. * Observers with relative motion will disagree which occurs first of any two events that are separated by a space-like interval. In other words, any travel that is faster-than-light in any inertial frame of reference will be traveling backwards in time in any other, equally valid, frames of reference. Because of this, there appear to be only a limited number of ways to justify Faster-Than-Light behavior: Option A: Ignore special relativity. Option B: Get light to go faster (Casimir vacuum). Option C: Give up causality Option D: Give up (absolute) relativity Option E: Go somewhere where the speed of light is not the limit Option F: Become faster without acceleration Option G: Consider speed as a complex quantity Option H: SpaceTime Fabric ( Tachyon In special relativity, while it is impossible to accelerate an object to the speed of light, or for a massive object to move at the speed of light, it is not impossible for an object to exist which always moves faster than light. The hypothetical elementary particles that have this property are called tachyons. Their existence has neither been proven nor disproven, but even so attempts to quantise them show that they may not be used for faster-than-light communication. However, since tachyons have imaginary mass, they are regarded as unphysical.)