One of the mysteries of the English language finally explained.
A surface in space-time, represented as a cone in three dimensions, comprising all the points from which a light signal would reach a given point (at the apex) simultaneously, and that therefore appear simultaneous to an observer at the apex.
- ‘His work on light cones, black holes, wormholes, and time travel were are extremely revolutionary.’
- ‘The future light cone represents the space that will eventually be filled by light emitted at that point.’
- ‘The easiest way to describe light rays and light cones is through geometric optics.’
- ‘But finally, the star may shrink in a way that the light cones will bend so much that they will not be able to escape.’
- ‘Angular momentum can twist light cones and even make time travel possible in theory if not in practice.’
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