world line
Noun
Meaning
English Wikipedia has an article on:world lineWikipedia
world line (plural world lines)
(physics) A path in spacetime, especially that traversed by an elementary particle from its creation to its destruction.
Examples
In a sense, during the U-turn the plane of simultaneity jumps from blue to red and very quickly sweeps over a large segment of the world line of the Earth-based twin.
In a Feynman diagram, each matter particle is represented as a straight line (see world line ) traveling through time, which normally increases up or to the right in the diagram.
It does this by sending a signal along the world line of a person and detecting the echo from the far end.
Relativistic time versus Newtonian time Views of spacetime along the world line of a rapidly accelerating observer in a relativistic universe.
The horizontal direction indicates distance (only one spatial dimension is taken into account), and the thick dashed curve is the spacetime trajectory (" world line ") of the observer.