PeterDonis's latest activity
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PeterDonis replied to the thread I Importance of Hanbury Brown and Twiss experiment.Yes. You have one light beam coming from a source, which is split by a beam splitter, and then you have two detectors, and you look for... -
PeterDonis replied to the thread I Importance of Hanbury Brown and Twiss experiment.It would help if you would give specific references for where you read or were told these things.
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PeterDonis replied to the thread I Importance of Hanbury Brown and Twiss experiment.A single Stern-Gerlach experiment is not a "correlation experiment". To do a correlation experiment with Stern-Gerlach devices, you need...
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PeterDonis replied to the thread I Euclidean geometry and gravity.The structure would have to be narrow enough for the variation in ##r## for a transverse beam to be negligible. Otherwise its proper...
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PeterDonis replied to the thread I Euclidean geometry and gravity.No, that's not the claim that was made. Here's the claim that was made: The beam is supposed to be held static against gravity in...
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PeterDonis replied to the thread I Euclidean geometry and gravity.I hadn't looked at it in detail because I was focusing on the first part and wanting to understand it. Having now looked at it, I'm not...
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PeterDonis replied to the thread I Euclidean geometry and gravity.You don't seem to understand that the proper acceleration is determined by the beam's worldline. You can't adjust it by applying...
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PeterDonis replied to the thread I Euclidean geometry and gravity.It occurred to me after posting #116 that by "local density" you might have meant something more like "local proper number density of...
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PeterDonis replied to the thread I Euclidean geometry and gravity.I'm not sure you can do that. If you build the object in flat spacetime in an unstressed state, and then move it to hovering statically...
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PeterDonis replied to the thread I Euclidean geometry and gravity.Depends on what you're trying to show. What I was trying to show is that I can take a rod built in flat spacetime with proper length...
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PeterDonis replied to the thread I Euclidean geometry and gravity.Nothing that I said depends on the material model. The details of exactly what stresses will be present for an object described by a...
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PeterDonis reacted to iste's post in the thread A Understanding Barandes' microscopic theory of causality with
Like.
But it doesn't seem to me that there is any preferred basis of configurations. Surely, Barandes formulation doesn't stop you from... -
PeterDonis replied to the thread I Euclidean geometry and gravity.Here, I'll even give a simple example for you to address the issue with. I build a rod in flat spacetime, in free fall. It has proper...
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PeterDonis replied to the thread I Euclidean geometry and gravity.It's not an argument, it's a definition of what proper acceleration is and what it means physically. You can't say that all of the...
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PeterDonis replied to the thread I Question about discussions around quantum interpretations.As I said, every QM interpretation has features that are unpalatable. It's just a question of what kinds of unpalatability you prefer to...