PeterDonis's latest activity
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PeterDonis replied to the thread Graduate Rotating Disk Method to Attain Light Speed?.Um, yes, you are: This is challenging the established theory--just with nothing to back the challenge up but vague generalities... -
PeterDonis reacted to FactChecker's post in the thread Graduate Rotating Disk Method to Attain Light Speed? with
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Particles have been accelerated to near the speed of light, so it is known how much energy and force is needed. The results agree with... -
PeterDonis reacted to Ibix's post in the thread Graduate Rotating Disk Method to Attain Light Speed? with
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As Peter has pointed out, in this thread all you can do is apply the theory. You can call this "doing a thought experiment" if you like... -
PeterDonis replied to the thread Graduate Rotating Disk Method to Attain Light Speed?.It can't be greater than or equal to the speed of light--that's the ultimate relativistic limit, even for unobtainium, superbium... -
PeterDonis replied to the thread Graduate What are the most fundamental entities in the SM and QFT?.Quantum fields. Neither. Quantum fields are first. See above. -
PeterDonis replied to the thread Graduate Rotating Disk Method to Attain Light Speed?.We've already given you the results that this lab produces--they're the results that relativity predicts. -
PeterDonis reacted to PeroK's post in the thread Graduate Rotating Disk Method to Attain Light Speed? with
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You might like to read this: https://math.ucr.edu/home/baez/physics/Relativity/SR/rigid_disk.html -
PeterDonis reacted to PeroK's post in the thread Graduate Rotating Disk Method to Attain Light Speed? with
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The idea of a disk confuses the issue that within the disk you have particles being accelerated towards ##c##. Each of those particles... -
PeterDonis replied to the thread Graduate Rotating Disk Method to Attain Light Speed?.At that point the disc is not a single object, each piece of it to which an external force is applied is a separate, independent object... -
PeterDonis replied to the thread Graduate Rotating Disk Method to Attain Light Speed?.Well, we don't have an actual test lab here, so all we can tell you is what the theory says. :wink: -
PeterDonis replied to the thread Graduate Rotating Disk Method to Attain Light Speed?.Relativity says it must be. Relativity imposes a finite limit on the strength of materials, and that limit ensures that it is impossible... -
PeterDonis reacted to Ibix's post in the thread Graduate Rotating Disk Method to Attain Light Speed? with
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No, just breaking apart, same as any other matter that you stress too much. Make jelly and put it on a barstool. Spin the barstool and... -
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The device distorts and disintegrates from internal stresses far before any part of it approaches lightspeed. If you posit arbitrarily... -
PeterDonis replied to the thread Undergrad Differentiation of the connections.Also, their use of the term "Fermi-Walker transport" is not consistent with other literature. They say their equation (B1) defines... -
PeterDonis replied to the thread Undergrad Differentiation of the connections.That at least explains their ##D / d \tau## notation--it's the same as what MTW call ##\nabla_\mathbf{u}##. So it's not quite the same...