5 ms·
Roughly because of Lorentz boost, aka length contraction. So if I take some distance, say 1m, and I look at it from relativistic speed it gets contracted. And i
by yk 11y ago
Roughly because of Lorentz boost, aka length contraction. So if I take some distance, say 1m, and I look at it from relativistic speed it gets contracted. And if I do that from high enough speeds, it gets contracted below the Planck length, so a fundamental length constant would violate Lorentz symmetry.
Some people tried to construct such a theory, but as far as I understand, they are going nowhere. See
https://en.wikipedia.org/wiki/Doubly_special_relativity https://en.wikipedia.org/wiki/Doubly_special_relativity
- mlonkibjuyhv 11y agoHow about if length contraction means that 1 meter is now fewer length quanta than before? I mean if spacetime is emergent why limit ourselves to an intuitive sense of what distance is.
- yk 11y agoWell, if you have less length quanta then we could call them a unit of length, they would no longer be any kind of fundamental property. ( But actually the notion of a particle is a rather big problem of quantum field theory in curved backgrounds.)
- qrendel 11y agoThis is essentially what I was asking - why wouldn't all inertial frames determine the size of length quanta to be the same, but disagree on the number of them between two events in spacetime.