Grinkle's latest activity
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Grinkle replied to the thread Undergrad I don't see how a black hole's event horizon can be crossed.One "B" level poster to another .... What I read from @PeroK is not that using the word 'perspective' is objectively wrong, rather... -
Grinkle reacted to PeroK's post in the thread Undergrad I don't see how a black hole's event horizon can be crossed with
Like.
When I was learning relativity I realised that all this about "perspectives" and "observers disagreeing" was unnecessary and leading the... -
Grinkle reacted to Dale's post in the thread Undergrad I don't see how a black hole's event horizon can be crossed with Like.
Yes. Coordinates are optionally added to a manifold, but only in a manner in which all coordinates can be used to write the laws of...
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Grinkle reacted to PeterDonis's post in the thread Undergrad I don't see how a black hole's event horizon can be crossed with Like.
True. But they can exist for a very, very, very, very, very long time. For example, the expected evaporation time by Hawking radiation...
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Grinkle reacted to RUTA's post in the thread Insights Quantum Entanglement is a Kinematic Fact, not a Dynamical Effect with Like.
I just retired from 37 years of teaching undergrad physics at Elizabethtown College (not R1, I was paid to teach). I have always wanted...
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Grinkle replied to the thread Insights Quantum Entanglement is a Kinematic Fact, not a Dynamical Effect.Thanks for taking the time to give that response, much appreciated. It has got to be fatiguing continually articulating things at a "B"...
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Grinkle replied to the thread Insights Quantum Entanglement is a Kinematic Fact, not a Dynamical Effect.@RUTA SR threads here often have a shared plotline, which I'll illustrate by example below - Q: Why do clocks move differently in...