File:Ligne Univers.png
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English: In physics, the world line of an object is the path of that object in 4-dimensional spacetime, tracing the history of its location in space at each instant in time. The concept of "world line" is distinguished from the concept of "orbit" or "trajectory" (such as an orbit in space or a trajectory of a truck on a road map) by the time dimension, and typically encompasses a large area of spacetime wherein perceptually straight paths are recalculated to show their (relatively) more absolute position states — to reveal the nature of special relativity or gravitational interactions. The idea of world lines originates in physics and was pioneered by Hermann Minkowski. The term is now most often used in relativity theories (i.e., special relativity and general relativity).
Français : En physique, la ligne d'univers d'un objet est le tracé d'un objet lorsqu'il voyage à travers l'espace-temps en 4 dimensions. Le concept de ligne d'univers se distingue du concept de l'« orbite » ou de la « trajectoire » (tel que l'orbite d'un corps dans l'espace ou la trajectoire d'un camion sur une route) par la dimension temporelle. L'idée des lignes d'univers trouve son origine dans la physique et Einstein en fut le pionnier. Le terme est maintenant utilisé le plus souvent dans les théories de la relativité (générale ou restreinte, par exemple). |
| Date | |
| Source | Own work |
| Author | Léah 30 |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
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| current | 21:37, 5 December 2012 | | 650 × 600 (57 KB) | Léah 30 (talk | contribs) | User created page with UploadWizard |
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