Nugatory's latest activity
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Nugatory reacted to Ibix's post in the thread Undergrad The Einstein Clock aka Light Clock with
Like.
Just think about that for a minute. You are standing by the road and a passing car turns on its turn indicator. How are you and the... -
Nugatory reacted to PAllen's post in the thread Undergrad The Einstein Clock aka Light Clock with Like.
Maybe it would help to imagine two flash bulbs, one in motion relative to the other. They both flash when one just passes the other. In...
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Nugatory replied to the thread High School Train Fall Paradox.Most relativity "paradoxes" are better described as "apparent contradiction resulting from a hidden bogus assumption, often used as a...
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Nugatory replied to the thread Is this device possible (hope not)?.Sure, if you assume the simuulation hypothesis then anything is possible; the master software developer just has to hack together a few...
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Nugatory replied to the thread Physics Career Prospects (outside of academia).With tongue somewhat in cheek, I've said that I used my undergraduate physics degree the way that a male peacock uses its tail feathers...
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Nugatory reacted to Cthugha's post in the thread Undergrad Importance of Hanbury Brown and Twiss experiment with Like.
Michelson interferometers, Mach-Zehnder interferometers (and also the double slit) measure field correlations. The quantity you measure...
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Nugatory replied to the thread Undergrad Prof Mike Wiest's proposed link between quantum and consciousness.It is not impossible that more years (decades?) of AI development will lead to conscious physical systems In which the underlying...
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Nugatory replied to the thread Undergrad Synchronizing clocks in an inertial frame if light is anisotropic.If it is at rest in the center of mass frame and we have arranged for a fully inelastic collision to happen inside it?
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Nugatory replied to the thread Undergrad An invariant while crossing the horizon.This is tricky even without introducing the complexities of an evaporating black hole. "Crosses the horizon at a finite proper time...
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Nugatory replied to the thread Undergrad I don't see how a black hole's event horizon can be crossed.This is a false dichotomy. For purposes of constructive discussion of special relativity, forty or so hours with Taylor and Wheeler’s...
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Nugatory replied to the thread Undergrad I don't see how a black hole's event horizon can be crossed.The equivalence principle says that sitting in a box at rest on the surface of a gravitating body (for example, in a closed room on the...
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Nugatory replied to the thread Undergrad How Is Intrinsic Curvature Measured in Higher Dimensions Like 4D Spacetime?.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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Nugatory replied to the thread Undergrad Synchronizing clocks in an inertial frame if light is anisotropic.Does that force us to deal with clock synchronization? Start with a source of light signals and a mirror, move the mirror around until...
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Nugatory reacted to A.T.'s post in the thread Undergrad How Is Intrinsic Curvature Measured in Higher Dimensions Like 4D Spacetime? with Like.
From: https://en.wikipedia.org/wiki/Tangent_space In the context of physics, the tangent space to a manifold at a point can be viewed...