matrixscarface Posted March 3, 2005 Report Posted March 3, 2005 Would the speed of light increase due to the pull of gravity in a black hole??
Thelonious Posted March 4, 2005 Report Posted March 4, 2005 Would the speed of light increase due to the pull of gravity in a black hole?? No.
maddog Posted March 4, 2005 Report Posted March 4, 2005 Would the speed of light increase due to the pull of gravity in a black hole??No as Thelonius says. However the Frequency will be shifted to the red as in Redshift. This is the GRversion of Doppler shifting. This is basically how the photon looses the energy since the speed staysthe same. :hyper: Maddog
paultrr Posted March 4, 2005 Report Posted March 4, 2005 He's correct. As long as the vacuum conditions that specify the speed of light in that medium remain the same there is never a change in the velocity of a photon. Had once a bit of a problem come up under this issue. A group of us co-wrote an article about shielding with metric engineering that appeared in Lanl. The main author of this article had at the time assumed that the equations ment the incoming photons were changing velocity. Assuming, and the assumption here could be argued a bit since the type of metric involved does produce a change in the local vacuum, C remained constant his assumption was false. As such while the article was one of the first to ever propose using metric engineering instead of EM to produce a shield against incoming particles, objects, or photons with possible benefit for earth the article as written was dead wrong. We did however republish such later with the photon velocity change taken out in a Journal. However, the original Lanl article still stands as wrongly written.
paultrr Posted March 4, 2005 Report Posted March 4, 2005 Real FTL implies either a particle who's local velocity can beat C in an even race or a change in the local vacuum state. Somehow one would have to alter Tuv locally to produce a real FTL state under the second condition. In the first tachyons from theory would fit the bill. But at the present from what we can observe they remain a product of theory alone. By the way, Warp drive and wormholes do not produce an even race. They work by altering the geometry of spacetime locally where such becomes possible. The local speed of light is never altered within a wormhole throat, except within the exotic energy region required to sustain one. In warp drive in some cases the local velocity can be altered front and back while remaining normal at the craft and far away with a remote observer. But Alcubierre's original case only had it altered in the regions were exotic energy was used. Reason I mention this is some modifications of this idea do involve a boosted condition in the frontal region. In that region C would be altered somewhat. But if you considered that type of field as a mixture of a strong gravity field forward and an exotic field behind then the only place C is altered is in the rear region. Forward C always holds under that model. This was the heart of Natario's argument against warp drive. He was correct about those infinite blue shifted incoming photons at the craft's region with that specific example. But that example was not the only case out there. Little bit of history on all this debate about FTL and what such actually can mean.
Dark Mind Posted March 4, 2005 Report Posted March 4, 2005 Well they basically covered all the bases and answered your question better than I could have, and yeah they are correct. You need to read a physics book or something though because that's some pretty basic stuff :cup:. Live and learn, and live to learn. (Oh, oh, oh. New idea for a thread :cup:. Will be posted in Philosophy if you're interested. Probably titled something like "What are we truly here for?" or something :hyper:.) You never know where you'll find inspiration :cup:.
Recommended Posts