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World line

A world line is the path that an object traces in 4-dimensional spacetime.

 


Explanation

In relativistic theory, proper time τ of a particle is the time measured in the area of this particle, that is in the area where it is immobile. The Lorentz factor can be written as

where

    t Time
    τ Proper time

 


Additional information

The German mathematician Hermann Minkowski introduced the notion of a word line in 1908.

 


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