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IoT
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Gravity itself is not matter. It is a force that arises from the interaction of objects with "gravitaional" mass. It is postulated that virtual gravitons are the propagator of this force in a similar way that virtual photons are the propagator for the electro-weak force. (Using the particle model of gravity rather than Eiensteins essentiall geometric model). Further the graviton itself is posulated to be a zero charge, zero rest mass spin 2 particle meaning that:
a) It travels at the speed of light.
b) It is a Boson (integer spin). This means, amongst other things that gravitons are completely indistinguishable from one another. If were were able to mix 2 together in a box, afterwards you would not be able tell which one was which.
Grand Unified Theories (GUTs) arise from the belief that the 4 fundamental forces of nature; Strong, Weak, Electromagnetic and Gravitational, are all facets of the same underlying single force.
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IoT
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quote:
Originally posted by Lefty Scaevola
Anybody got an answer for this yet? |
I am not certain but I imagine that intervening mass wouldd at a minimum cause dispersal of gravity waves. And thinking about it a bit more it's possible that the vacuum itself would cause some shielding. There is no such thing as a pure vacuum - its more a seething foam. Short lived virtual particle-antiparticle pairs are being created all the time and these particle/anti-particle pairs have mass.
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IoT
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And more accurately Eiensteinian relativity forbids anything crossing the speed of light barrier. It does not a priori forbid the existance of particles that travel faster than the speed of light - they just cannot be slowed to below the speed of light. Hence the proposal of tachyons - although how you would prove thier existance is beyond me.
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Ethelred
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Crank site.
Even though he has a real science education he is still a crank.
Lambert Dolphin is under the delusion that the Earth is only about 6000 years old. So to patch physics he and others sometimes pretend real hard that the speed of light is EXTREMELY variable. Carefully ignoring the fact that it would cause other variable to change so much the Earth would be a molten ball with metalic vapor for an atomosphere due the accelerated decay of radioactive material that he needs to make the Earth look so young.
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KrazyHorse
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Macedonia
May 2001
time: 00:22
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quote:
Originally posted by Ned
Interesting article on a number of points.
Point 1. The speed of light relative to a moving observer is not constant. Because matter is a wave, the clocks change to make it appear constant |
Bollocks. Your interpretation sucks ass
quote:
Point 2. If gravity has a speed, it is much, much greater than the speed of light |
Bollocks. We've not had the ability to adequately test the speed till now due to weakness of grav. coupling constant.
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Point 3. The postulate than nothing can propagate faster than the speed of light is false. |
Bollocks, as it is based on (2)
EDIT: changed (1) to (2)
Last edited by KrazyHorse on 07-09-2002 at 08:39
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Ethelred
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quote:
Originally posted by Frogger
I didn't even realise he was involved in Creationist gobbledygook. The site was wacko enough on its own merits... |
I have known about Lambert for over two years. I have him in my reference section of my favorites. Just in case someone uses him for a source. Some pages are more clearly Creationist than others but all the science on them is based on the idea that the Fundamentalist view of the Universe is the basis or at least the guidline for all knowledge.
While it is possible that the speed of light is not constant there sure is little indication of it for billions of light years out into space. I think maybe a little at the edge of our perception and that is where the idea of an accelerating universe comes from.
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Ethelred
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quote:
Originally posted by Ned
The article states the facts and concludes that they are consistent with Lorentzian Relativity and inconsistent with Special Reltivity.
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Are you referring to Slowhand's link to the Lambert Dolphin site? I didn't bothet to look at it. THIS TIME so don't anyone think I am being close minded. I read that nonsense a long time ago.
That site has one idea of what constitutes fact. The Bible and only the Fundamentalist view of the Bible. Any facts that show it wrong are either ignored or subjected to what can at best be called unproven hypothetical manipulation till all sight of reality is either lost or covered over.
There are stars that are billions of light years away. Hmm what to do. OH I HAVE IT. The speed of light has changed. What do mean the evidence doesn't support it. The Bible shows us the universe isn't that old so the speed of light must have changed.
There are way too many products of the U-238 decay sequence. I HAVE A SOLUTION. The rate of decay has changed and U-238 in the past had a decay rate of many orders of magnitude higher than today. Yes thats it.
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Only Lambert hadn't noticed the last time I looked that his solution would turn the Earth into a VERY hot molten mass even at the surface. Maybe he has patched that up a bit now. Of course that would entail some profound changes in every other element and most likely some changes in probabilistic events that are somewhat inherent in numbers themselves rather than in the specifics of physical constants.
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07-09-2002 04:02
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