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Here we go again... "scientists would look at the ripples in the fabric of space and time". Am I the only one who finds this expression very confusing? What fab
by lottin 7y ago
Here we go again... "scientists would look at the ripples in the fabric of space and time". Am I the only one who finds this expression very confusing? What fabric? There is no fabric. Space and time are coordinates. They do not exist physically at all. There cannot be a fabric of space and time.
- guerrilla 7y agoAre you sure that's how general relativity sees spacetime? What about graviational waves and vacuum energy? > On 11 February 2016, the LIGO and Virgo Scientific Collaboration announced they had made the first direct observation of gravitational waves. https://en.wikipedia.org/wiki/Gravitational_wave https://en.wikipedia.org/wiki/Gravitational_wave
- eljimmy 7y agohttps://en.wikipedia.org/wiki/Spacetime https://en.wikipedia.org/wiki/Spacetime
- tiborsaas 7y agoIt's a metaphor to help humans grasp it better. Space and time does exists physically. Does a shortest path between you and your workplace exists that you can traverse? Is it a straight line? No, it's not, but there's one path that you as a being can walk along physically. The buildings, roads, obstacles force you to diverge from the ideal straight line. That's another analogy of what space & time is. Fabric is just shorter.
- ssijak 7y agoWell, as farbas I understand quantum loop gravity, there is a fabric of space and time
- doliveira 7y agoTwists and turns like a fabric, waves like a fabric...