2 ms·
You can't make an electron bigger, so it can't be stretched out. Other point particles are the same. The forces that hold physical stuff together are much more
by roywiggins 7y ago
You can't make an electron bigger, so it can't be stretched out. Other point particles are the same. The forces that hold physical stuff together are much more powerful than the gentle expansion of space, so we don't see people and planets dissolving.
- Koshkin 7y agoIndeed you can, if you realize that the place occupied by the "point particle" is described by its wavefunction.
- roywiggins 7y agoI know! But when you poke it, it still acts like a particle and the wavefunction localizes again, right? It doesn't exactly "puff up" like a billiard ball. Electrons don't really get bigger when they are put into states where their position is less localized. But the expansion of space does "stretch" light- or at least, the wavelength gets longer, so it's not not happening.