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spacetime is any mathematical model that combines space and time into a single interwoven continuum. The spacetime of our universe is usually interpreted from a Euclidean space perspective, which regards space as consisting of three dimensions, and time as consisting of one dimension, the ‘fourth dimension’. By combining space and time into a single manifold called Minkowski space, physicists have significantly simplified a large number of physical theories, as well as described in a more uniform way the workings of the universe at both the supergalactic and subatomic levels…In cosmology, the concept of spacetime combines space and time to a single abstract universe.
Reification (also known as concretism, or the fallacy of misplaced concreteness) is a fallacy of ambiguity, when an abstraction (abstract belief or hypothetical construct) is treated as if it were a concrete, real event, or physical entity. In other words, it is the error of treating as a concrete thing, something which is not concrete, but merely an idea.
Another common manifestation is the confusion of a model with reality. Mathematical or simulation models may help understand a system or situation but real life will differ from the model (e.g. ‘the map is not the territory’).
In physics, gravitational waves are ripples in the curvature of spacetime that propagate as a wave, travelling outward from the source. Predicted in 1916 by Albert Einstein to exist on the basis of his theory of general relativity, gravitational waves theoretically transport energy as gravitational radiation.
originally posted by: theantediluvian
a reply to: AnarchoCapitalist
Out of curiosity, how does EU/PC explain time dilation with electric gravity?
originally posted by: AnarchoCapitalist
The Fermi National Accelerator Laboratory defines . . .
originally posted by: AnarchoCapitalist
. . . General Relativity treats gravity as if it is a function of bending spacetime (a mathematical abstraction), while atomic level forces must be related to real physical particles or force carriers. This leaves scientists trying to tie two completely different mathematical models together, both of which fundamentally have no basis in the real material world.
originally posted by: glend
Light shone from A appears to travel at 186,000 mps from A. If we launch a spacecraft from A at half the speed of light, then shine light from that spacecraft, that light still appears to be travelling at 186,000 mps because of time dilution. Both light sources seem to be travelling at 186,000 mps from A or the spacecraft.
That makes spacetime a fabric that interferes with time itself. The faster we travel in the fabric the slower time becomes.
originally posted by: Soylent Green Is People
If the space I travel through is nothingness, then why does traveling through that space cause my time to dilate?
originally posted by: Mary Rose
If “atomic level forces must be related to real physical particles or force carriers,” why do you say “both of which fundamentally have no basis in the real material world”?
Haven't you just described at least the atomic level forces as related to the real material world?
A great deal of time and effort has gone into coming up with a theory of gravity that can define it at the atomic level, as well as at the macro level. Creating such a theory would “unify” Special and General Relativity. It should be obvious this is impossible because General Relativity treats gravity as if it is a function of bending spacetime (a mathematical abstraction), while atomic level forces must be related to real physical particles or force carriers. This leaves scientists trying to tie two completely different mathematical models together, both of which fundamentally have no basis in the real material world. The attempt to unify the two has been going on for well over 100 years.