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Nugatory's latest activity
Nugatory
replied to the thread
B
Question about bendability of objects in 4 dimensions
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This measurement is done (conceptually) with one cesium atom in one place so the question of simultaneity never comes up - we watch the...
Today, 3:36 PM
Nugatory
replied to the thread
Why do paired electrons have no magnetic field lines?
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They don’t have any coordinates, at least not the way you’re thinking about coordinates, and they do not have a position in space. The...
Today, 3:24 PM
Nugatory
replied to the thread
Why do paired electrons have no magnetic field lines?
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There may not be any. The problem is that the quantum mechanical behavior of particles like electrons has no good classical analogs...
Today, 1:56 PM
Nugatory
replied to the thread
I
A question about Relativity of Time using Time dilation experiment
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When we push on one end of the stick, the forces cannot propagate faster than the speed of light, and in fact they propagate at the the...
Today, 1:33 PM
Nugatory
replied to the thread
B
Quantum teleportation of usable information
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Nope, doesn’t work. You can Google for the “quantum non-communication theorem”, or read some of our many many threads on why it work...
Monday, 3:51 PM
Nugatory
replied to the thread
I
Understanding Spacetime simultaneity in twin paradox scenarios
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We have known for decades now (start with a Google search for “Bell’s theorem experiments”) that that is incorrect. Aside from the fact...
Monday, 3:46 PM
Nugatory
replied to the thread
I
Understanding Spacetime simultaneity in twin paradox scenarios
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No. That is not how forces and acceleration work in special relativity. You are making an easy problem difficult by not using the math...
Monday, 12:06 PM
Nugatory
reacted to
kingamada's post
in the thread
Gravity Based Electricity Generator
with
Like
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Thank you so much, you really did grasp my idea. Maybe I didn't ask the right questions, as you know sometimes it's about the quality of...
Sunday, 3:32 PM
Nugatory
replied to the thread
B
Falling into a black hole
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Sorry, yes, I was talking about quadrant II.
Sunday, 10:14 AM
Nugatory
replied to the thread
B
Falling into a black hole
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I expect that it is largely historical. When we're solving the EFE for a spherically symmetrical spacetime, it's just another...
Sunday, 9:42 AM
Nugatory
replied to the thread
B
Falling into a black hole
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For that particular question the video below by our member @A.T. may be even more helpful. The squiggles just indicate that the...
Sunday, 9:17 AM
Nugatory
replied to the thread
B
Falling into a black hole
.
In quadrant II the ##r## coordinate is timelike, so curves of constant ##r## are at less than a 45-degree angle and as @PeterDonis says...
Saturday, 10:29 PM
Nugatory
replied to the thread
B
Falling into a black hole
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You might try this one: https://en.m.wikipedia.org/wiki/File:Kruskal_diagram_of_Schwarzschild_chart.svg All of spacetime outside of the...
Saturday, 11:10 AM
Nugatory
replied to the thread
B
Falling into a black hole
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Looks like a whole bunch of other people got answers in while I was typing my response (so that is what we're all doing on Saturday...
Saturday, 6:15 AM
Nugatory
reacted to
codelieb's post
in the thread
I
Did Feynman make a mistake in the drawing of moving charges?
with
Like
.
First of all, I would like to mention that Feynman did not draw this figure. Matthew Sands drew it. Feynman's figure we much simpler...
Saturday, 5:56 AM
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