Relativity and gravitational theory Special relativity: kinematics Concept
Proper time
Summary
The proper time along a timelike world line is the time measured by an ideal clock carried along it. It is the Lorentzian length of the world line divided by , so it is the same in every inertial frame. It is the natural time parameter for a moving particle, and it differs from coordinate time by the factor of time dilation.
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About this page
| Tag | YG74WHC3S9 |
|---|---|
| URI | m2://YG74WHC3S9 |
| Kind | concept |
| Writing | W0 stub |
| MSC | 83A05, 53B30 |
| Same as | |
| Changed | 3 November 2026 |
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Used by
- Relativistic Lagrangian of a free particle
- Four-acceleration
- Relativistic mechanics
- Twin paradox
- Hyperbolic motion
- Time dilation
- Four-momentum
- Sagnac effect
- Fermi–Walker transport
- Four-velocity
- Geodesics in general relativity