Linked from
The 22 pages that link to Light cone, each with the reason it gives.
Special relativityRelated: Its boundaries encode the causal limit imposed by invariant light speed.
Spacetime intervalRelated: The interval’s zero-valued separations form the light-cone boundary.
Event (relativity)Related: It divides other events into causally reachable and unreachable regions.
WorldlineRelated: It constrains which worldline directions are physically possible.
Spacetime diagramRelated: Its boundaries mark light paths and divide possible causal relations.
Retarded timeRelated: Its past boundary identifies events capable of influencing an observation.