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Light cone

Not to be confused with Cone cell or Cone of light.
Light cone in 2D space plus a time dimension more commonly referred to as ‘Space Time’.
Special relativity
The world line: a diagrammatic representation of spacetime
Foundations
Consequences
Spacetime
Dynamics
People

In special and general relativity, a light cone (or "null cone") is the path that a flash of light, emanating from a single event (localized to a single point in space and a single moment in time) and traveling in all directions, would take through spacetime.

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