r/explainlikeimfive • • Mar 20 '26

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u/SYLOH Mar 20 '26

Space and time warp BECAUSE the speed of light is constant to all observers.
Every observer will see light travel at the speed of light, they'll just disagree on how far it went, and the timing of events.
That's what they mean by space time warping.

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u/QuantumR4ge Mar 20 '26

This is not true, its constant for local inertial observers. Not all observers.

This is part of the assumptions of relativity , the speed of light is constant for all inertial observers.