Science Fair Project Encyclopedia
In the context of special relativity, time-like separated points (or events) in spacetime have a spacetime interval greater than 0 (see sign convention). This means that the events can be causally connected (i.e. one can be a cause or effect of the other) because light from one event can reach the other. Observers in different reference frames must therefore see the events as occurring in the correct order.
The contents of this article is licensed from www.wikipedia.org under the GNU Free Documentation License. Click here to see the transparent copy and copyright details