Dale's latest activity
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Dale replied to the thread I I don't see how a black hole's event horizon can be crossed.Valid is a fine word. If you want to go beyond valid then a more clear description is that the principle of general covariance says that... -
Dale replied to the thread I I don't see how a black hole's event horizon can be crossed.The standard Schwarzschild coordinates that you refer to in the second statement are on a different manifold than the Hawking spacetime...
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Just ONCE, I wanted to see a post titled Status Update that was not a blatant, annoying spam post by a new member. So here it is...
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Dale reacted to PeterDonis's post in the thread I Schrödinger equation and classical wave equation with
Like.
What does "completely different" even mean? And why do you care? Who is even making this claim? And again, why do you care? Okay... -
Dale reacted to James Hasty's post in the thread I Synchronizing clocks in an inertial frame if light is anisotropic with Like.
I agree this works, but only because you have defined the convention for the 1-way speed of light in both directions.
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Dale replied to the thread I Synchronizing clocks in an inertial frame if light is anisotropic.That is good work. It is much more difficult to do than it appears at first glance.
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Dale reacted to Greg Bernhardt's post in the thread Insights Why Entangled Photon-Polarization Qubits Violate Bell’s Inequality with Like.
Insights auto threads is broken atm, so I'm manually creating these for new Insight articles. In her YouTube video Bell’s Theorem...
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Dale reacted to James Hasty's post in the thread I Synchronizing clocks in an inertial frame if light is anisotropic with Like.
The purpose of my post was to demonstrate a way to synchronize two clocks located in the same inertial frame. I thought this would be...
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Not only why, but ”you cannot”. It is impossible to do it without parallel transport - or at least without parallel transport being...
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Dale replied to the thread I Synchronizing clocks in an inertial frame if light is anisotropic.I don’t think this is correct.
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Dale replied to the thread I Synchronizing clocks in an inertial frame if light is anisotropic.Indeed, if I am reading my notebook correctly the Lagrangian for a free particle in an Anderson synchronized frame is $$L=-(\dot...
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When @geordief wrote that he was still under the misunderstanding that “I think parallel transport relies on these tangent planes [that...
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Dale replied to the thread I Intrinsic curvature.I hadn’t seen that, but it is a good quote. It also helps that it is clear that physics depends not only on positions but also on...
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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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The tangent space at a point is not a plane in the 3D embedding space (although that is a natural way of visualizing it, continuing our...