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Proper time

The proper time τ is the time that passes on a certain world line.

 


Explanation

In relativistic theory, proper time of a particle is the time measured in the area of this particle, that is in the area where it is immobile.

 


Example 1

The Lorentz factor can be written as

where

    t Time
    τ Proper time

 


Additional information

The German mathematician Hermann Minkowski introduced the notion of proper time in 1908.

 


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