PeterDonis's latest activity
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PeterDonis replied to the thread I Synchronizing clocks in an inertial frame if light is anisotropic.I don't think distance itself is something in people's heads. But definitions of units of distance are. As you note, the SI definition... -
Note, there are other ways to define intrinsic curvature constants. For example, consider the area of a small circle on the surface of a...
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PeterDonis replied to the thread I Schrödinger equation and classical wave equation."I've heard" is not a valid reference. If you can give us references to actual textbooks or peer-reviewed papers that make statements...
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PeterDonis replied to the thread I Schrödinger equation and classical wave equation.Again, there's a lot in your post #1, and I'm not sure which question you're talking about. I only confirmed that ##\Psi## is a...
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They aren't "on" the sphere anywhere. There is a mapping from each point on the surface of the sphere to a two-dimensional vector space...
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PeterDonis replied to the thread I Intrinsic curvature.The mathematical sphere is a model. It's not anything in reality. We often use models to make predictions about reality, but that...
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PeterDonis replied to the thread I Intrinsic curvature.They are mathematical abstractions that rely on the fact that, locally, the sphere looks flat (the effects of its curvature get smaller...
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PeterDonis replied to the thread I Intrinsic curvature.No, they aren't. Tangent spaces do not rely on any embedding. People often visualize tangent spaces using such an embedding, but that's...
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PeterDonis reacted to pervect's post in the thread I Synchronizing clocks in an inertial frame if light is anisotropic with
Like.
I'd like to expand on my earlier point. Suppose we have some frame in which Newton's laws work. Two equal masses moving in opposite... -
PeterDonis replied to the thread I Question about discussions around quantum interpretations.Robert Leighton was a physicist and coauthor of the Feynman lectures. His son Ralph Leighton was not, nor did he ever claim to be...
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PeterDonis replied to the thread I Schrödinger equation and classical wave equation.Still a lot, and I'm not sure where it's all coming from or why you're asking about it. Some references would be helpful. If your main...
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PeterDonis replied to the thread I Schrödinger equation and classical wave equation.You said a lot in post #30. What particular point or points are you asking about?
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PeterDonis reacted to pervect's post in the thread I Synchronizing clocks in an inertial frame if light is anisotropic with Like.
As long as you don't believe that your clock synchronization has any physical significance, in particular as long as you don't address...
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PeterDonis replied to the thread I Schrödinger equation and classical wave equation.What does "completely different" even mean? And why do you care? Who is even making this claim? And again, why do you care? Okay...
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PeterDonis replied to the thread B Need help understanding particle physics and quantum physics.You seem to think that being a "fundamental particle" is somehow different from being a quantum field. It isn't. The only theoretical...