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Grinkle's latest activity
Grinkle
replied to the thread
I
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...
Oct 2, 2025
Grinkle
reacted to
PeroK's post
in the thread
I
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...
Oct 2, 2025
Grinkle
reacted to
Dale's post
in the thread
I
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...
Oct 2, 2025
Grinkle
reacted to
PeterDonis's post
in the thread
I
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...
Oct 2, 2025
Grinkle
reacted to
RUTA's post
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Insights
Quantum Entanglement is a Kinematic Fact, not a Dynamical Effect
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Like
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I just retired from 37 years of teaching undergrad physics at Elizabethtown College (not R1, I was paid to teach). I have always wanted...
Sep 22, 2025
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"...
Sep 22, 2025
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...
Sep 22, 2025
Grinkle
reacted to
phinds's post
in the thread
I
Describing the Big Bang
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If it is infinite now then it HAD to be infinite at the time of the singularity because you can't get from finite to infinite The...
Sep 16, 2025
Grinkle
reacted to
PeroK's post
in the thread
I
Describing the Big Bang
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The NG article is not worth reading. According to Introduction to Modern Cosmology by Liddle: The Big Bang model is reliable back to...
Sep 16, 2025
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