If it does it has the potential to violate causality. Theory predicts it doesn't.papakapp said:What is gravity? does it travel faster than light?
We already know General Relativity and Quantum Mechancs are incompatible and incomplete, you're no revolutionary there. Furthermore, it is for reasons a lot deeper than questions such as "does gravity travel at the speed of light?" Althought it hasn't been tested yet, we're pretty sure, from a theoretical framework, that yes gravity does travel at the speed of light. Remember that information cannot travel faster than c, and if it did, we would be able to violate causality (for reasons I'm too lazy to explain right now). The only reason we've been unable to test it is because gravity is a very, very, very weak force and the instrumentation necessary has to be extremely sensitive. Remember that although Einstein's General Relativity predicted that time goes slower for higher gravities, this wasn't tested until 1976 with Gravity Probe A. Moreover, the concept of "frame dragging" wasn't predicted until Gravity Probe B, which is still in operation. So I guess we'll eventually have a Gravity Probe C that will try to test the speed of gravity.We have some working theories regarding gravity but they don't explain everything. For example, suppose the sun just disapeared. When would it get dark on earth? 7 minutes later, right? well when would earth stop orbiting and just fly off in a straight line? instantly, right? we don't really know because no one has tested this by making the sun dissapear but the point is that we have no working models in science to explain this. what if we have to abandon our old theories rather than refine them to get the answer? Who knows? Not me. The point is that I don't want to surpress either possibility.
It really bothers me when people project their personal ignorance of science to the ignorance of science itself. This is a well-explained phenomenon. First of all yes, light does slow down--this is basic optics, when light changes from one medium to a denser medium it slows down. The energy comes from the fact that some of the light gets absorbed into the glass.If you shine light on a glass the glass gets warm, right? where does the energy come from? the light does not slow down. But it still gives up some energy in the form of heat, right? Maybe the heat does not come from the light? We have no explination. I have no clue how this works but I would like to keep my options open.
Maybe you haven't read one. It doesn't take energy to keep something static. Just like it doesn't take energy to keep us attached to the Earth. It's called a force for a reason and the equation for energy in this case is W=Fd (W is work). The refridgerator magnet is not doing any work when it is stuck to the fridge because it is not accelerating anything. Consequently, it needs no energy to keep it attached.okay, last one. I promise this time. If you stick a magnet on your fridge it stays, right? where does this energy come from? It has to fight gravity 24/7. What the heck is that? Perpetual energy? Beats me but nobody has come up with a very good explination.
They don't confuse me... So basically your argument is "I don't understand it there for it is wrong?" Could you possibly tell me a way to explain differential geometry, spacetime curvature metrics, partial differential equations (for Maxwell's equations for example) to a 6-year-old? Are you serious?The best current science can do is come up with overly complicated formulas that confuse everybody and offer no final answers. You can't really explain something until you can explain it on a 6 year old level.
I haven't gotten a chance to look at that site yet.
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