| |
| | Proper Time [Internet Encyclopedia of Philosophy] |
 | | We can define alternative, non-Cartesian, coordinate systems for Euclidean space; for instance, cylindrical and spherical coordinate systems are very useful in physics, and they use mixtures of linear or radial distance, and angles, as the numbers to specify points of space. |
 | | In these diagrams, the space axes represent points which are measured to have the same time coordinates, and similarly, the time axes represent points which are measured to have the same space coordinates. |
 | | The spacing of the x coordinates is the same as the x coordinates, which means that relative distances between points are not affected. |
| www.iep.utm.edu /ancillaries/Proper-Time.htm (9520 words) |
|