PeterDonis's latest activity
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PeterDonis replied to the thread Undergrad Looking closely at the descent into a black hole.How are you obtaining this? Based on what math? -
PeterDonis replied to the thread Undergrad Relativity, time, and quantum mechanics.On what basis are you making this claim? The "different momentum components" are not observables; they are just a convenient basis in... -
PeterDonis replied to the thread Undergrad Looking closely at the descent into a black hole.If by "see" you mean purely by analyzing the light rays coming from the pendulums and looking at things like angles subtended in your... -
PeterDonis replied to the thread Undergrad Looking closely at the descent into a black hole.As far as I can see, you're not computing anything. You haven't shown any math. You're just waving your hands. At this point I don't... -
PeterDonis replied to the thread Undergrad Relativity, time, and quantum mechanics.On what basis are you making this statement? -
PeterDonis replied to the thread Undergrad Looking closely at the descent into a black hole.Even if we grant that things would appear this way to an observer looking only at light signals, this... ...is not correct. Two... -
PeterDonis replied to the thread Undergrad Looking closely at the descent into a black hole.Actually, I was mistaken here; it's a measure of tangential tidal gravity, since the two pendulums are separated tangentially, not radially. -
PeterDonis replied to the thread Undergrad Looking closely at the descent into a black hole.I don't understand this. You can measure dH locally: just put a ruler between the bottom ends of the two pendulums. And I don't see any... -
PeterDonis replied to the thread Undergrad Looking closely at the descent into a black hole.There is no such thing for a black hole. ##r = 0## for a black hole is not a place in space; it's a moment of time. The geometric... -
PeterDonis replied to the thread Graduate Quantum measurement problem (ie double slit experiment) question.Then you can't get single outcomes. Yes, but using a "reduced state" at all already assumes that you have a single outcome--without... -
PeterDonis replied to the thread Graduate Quantum measurement problem (ie double slit experiment) question.Not about any personal theory you might have; that's off limits here. You're contradicting yourself. If "a unitary description ceases... -
PeterDonis replied to the thread Undergrad Looking closely at the descent into a black hole.This is only true, as I said, for arrows close enough to the observer. For arrows somewhat further around the photon sphere, the... -
PeterDonis replied to the thread Undergrad Relativity, time, and quantum mechanics.Is an approximation to begin with. As I understand it, the approximation requires the particles to be free (so that they can be assigned... -
PeterDonis replied to the thread Graduate Quantum measurement problem (ie double slit experiment) question.Short answer: no. The things you are vaguely describing all involve a change to the dynamics, making it no longer unitary. Indeed... -
PeterDonis replied to the thread Graduate Quantum measurement problem (ie double slit experiment) question.Moderator's note: Thread moved to the QM interpretations subforum.