8 ms·
Well we have only ever measured the round trip speed of light. Our current understanding of physics seems definitely imply the one way speed should be the same,
by anfilt 4y ago
Well we have only ever measured the round trip speed of light. Our current understanding of physics seems definitely imply the one way speed should be the same, but we have not been able measure it. If it some reason does turn out to be different then rate at which causality moves then depends on direction.
https://en.wikipedia.org/wiki/One-way_speed_of_light https://en.wikipedia.org/wiki/One-way_speed_of_light
- andrewflnr 4y agoMaybe it suffices to say that as long as all experiments continue to be consistent with light being the same speed in all directions, all experiments will also continue to be consistent with FTL breaking causality, so bringing up a barely, hypothetically possible conspiracy of reality against experiment is a distraction at best.