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Results tagged with reference-frames
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user 26918
A reference frame is a particular coordinate system chosen to represent physical entities. The notion is most often used in special and general relativity to denote particular coordinates chosen on the spacetime manifold.
0
votes
Accepted
Is there such a thing as maximal deceleration/negative g-force?
They're identical - the only difference is the frame of reference you use.
Picture a car accelerating north at 10m/s/s. Intuitively, for the driver, this is a positive g force because we're used to a …
- 498
0
votes
Accepted
How do electromagnetic waves/light travel at the speed of light?
Lots of questions! I'll try to get each of them:
the object become infinitely heavy and requires infinite energy to
move
Light (photons) have no rest mass - ten, a hundred or a million times n …
- 498
1
vote
Do absolute space and time exist?
Generally, no, Newton's concept is now seen as a limit case of Relativity - you only get (exact) Newtonian mechanics when the velocity and masses of all objects involved reach zero. There have been va …
- 498