Meaning of light cone in English:

light cone


  • 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 which therefore appear simultaneous to an observer at the apex.

    ‘Angular momentum can twist light cones and even make time travel possible in theory if not in practice.’
    • ‘The future light cone represents the space that will eventually be filled by light emitted at that point.’
    • ‘His work on light cones, black holes, wormholes, and time travel were are extremely revolutionary.’
    • ‘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.’