PeterDonis's latest activity
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PeterDonis replied to the thread A Jackson: justification of the Poynting vector by GR.Technically, yes, but the kind of departure is important. See below. No, there are two free parameters in the RN metric, ##M## and... -
PeterDonis replied to the thread I EPR revisited.I'm not sure what "studies" you're referring to, but it's certainly true that there have been plenty of experiments testing both...
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PeterDonis replied to the thread I EPR revisited.You may conclude that that statement, as you make it, is not even well-defined. You didn't specify a time in any frame at which B has...
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PeterDonis replied to the thread A Jackson: justification of the Poynting vector by GR.The possible departure from uniqueness is pretty small: all we have, by your argument, is one additional free parameter in the solution...
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PeterDonis replied to the thread A Jackson: justification of the Poynting vector by GR.This would amount to a different prediction for how much energy density a given amount of electric field produces; there would be an...
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PeterDonis replied to the thread A Jackson: justification of the Poynting vector by GR.Not entirely ruled out mathematically. But, for example, any alternative possibility, if it's going to lead to a different solution...
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PeterDonis replied to the thread A Jackson: justification of the Poynting vector by GR.But I didn't make use of that part of the article in my derivation in this thread.
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PeterDonis replied to the thread A Jackson: justification of the Poynting vector by GR.Of course. Again, I think you misunderstood me. I was providing the link so that more of the equations that I was using would be seen...
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PeterDonis replied to the thread A Jackson: justification of the Poynting vector by GR.The condition that the energy density of an electric field ##E## is ##E^2## (modulo some constant factors that depend on your choice of...
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PeterDonis replied to the thread A Jackson: justification of the Poynting vector by GR.For some more background on why that's true, see my Insights article giving a short proof of the standard Birkhoff's Theorem...
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PeterDonis replied to the thread A Jackson: justification of the Poynting vector by GR.They would also have to be compatible with the source-free Maxwell Equations. More precisely, since modifications to the SET mean...
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PeterDonis replied to the thread A Jackson: justification of the Poynting vector by GR.Sorry, I misspoke. It's a specific form for the EM field tensor.
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PeterDonis replied to the thread A Jackson: justification of the Poynting vector by GR.I'll take a stab at it here. I'll be making use of some equations from two of my Insights articles, on the EFE and Maxwell's Equations...
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PeterDonis replied to the thread A Jackson: justification of the Poynting vector by GR.For reference, in MTW it's exercise 32.1.
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PeterDonis replied to the thread A Jackson: justification of the Poynting vector by GR.Wald has it as part (c) of Problem 3 in Chapter 6. But note that the SET for this part is not "postulated". It is derived by first...