this post was submitted on 11 Dec 2023
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Light-Speed Spaceships Would Have Trouble Phoning Home (www.iflscience.com)
submitted 11 months ago* (last edited 11 months ago) by kalkulat@lemmy.world to c/technology@lemmy.world
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[–] SpacetimeMachine@lemmy.world 13 points 11 months ago

C is more than just the speed of light. It is the speed of Causality. No information can travel faster than C in a vacuum. Gravitational waves already reach us faster than the light from events that cause them (i.e. neutron star collisions) Because small particles slow down the light over long distances, as they absorb and then re-emit the photons.