Changes

In classical mechanics, the use of Euclidean space instead of spacetime is appropriate, as time is treated as universal and constant, being independent of the state of [[motion]] of an observer. In [[relative|relativistic]] contexts, however, time cannot be separated from the three dimensions of space, because the rate at which time passes depends on an object's velocity relative to the speed of [[light]] and also the strength of intense [[gravity|gravitational]] fields which can slow the passage of time.

In classical mechanics, the use of Euclidean space instead of spacetime is appropriate, as time is treated as universal and constant, being independent of the state of [[motion]] of an observer. In [[relative|relativistic]] contexts, however, time cannot be separated from the three dimensions of space, because the rate at which time passes depends on an object's velocity relative to the speed of [[light]] and also the strength of intense [[gravity|gravitational]] fields which can slow the passage of time.

<center>For lessons on the [[topic]] of '''''Spacetime''''', follow [http://nordan.daynal.org/wiki/index.php?title=Category:Spacetime this link].</center>

<center>For lessons on the [[topic]] of '''''Spacetime''''', follow [https://nordan.daynal.org/wiki/index.php?title=Category:Spacetime this link].</center>

== Concept with dimensions ==

== Concept with dimensions ==

The concept of spacetime combines space and time within a single coordinate system, typically with three spatial dimensions: length, width, height, and one temporal dimension: time. Dimensions are components of a coordinate grid typically used to locate a point in a certain defined "space" as, for example, on the globe by latitude and longitude. In spacetime, a coordinate grid that spans the 3+1 dimensions locates "events" (rather than just points in space), so time is added as another dimension to the grid. Unlike in normal spatial coordinates, there are restrictions for how measurements can be made spatially and temporally. These restrictions correspond roughly to a particular mathematical model which differs from Euclidean space in its manifest [[symmetry]].

The concept of spacetime combines space and time within a single coordinate system, typically with three spatial dimensions: length, width, height, and one temporal dimension: time. Dimensions are components of a coordinate grid typically used to locate a point in a certain defined "space" as, for example, on the globe by latitude and longitude. In spacetime, a coordinate grid that spans the 3+1 dimensions locates "events" (rather than just points in space), so time is added as another dimension to the grid. Unlike in normal spatial coordinates, there are restrictions for how measurements can be made spatially and temporally. These restrictions correspond roughly to a particular mathematical model which differs from Euclidean space in its manifest [[symmetry]].