Comment on 4th dimension doesn't exist because even 1D or 2D themselves are not real.
givesomefucks@lemmy.world 3 days ago
1D and 2D are just mathematical abstractions.
Your confusion is you expect 1d and 2d universes to exist within ours, when the reality is they are separate universes.
It’s not like one is built on top of the other, they exist separately and incompatibly.
We currently only see models of it in our universe, just like anyone from a higher order universe would only be able to see models of ours.
It would take insane levels of technology for them to even briefly appear here, and the only reason that would be worth it is if we’re essentially a “warp” zone for them where moving a short distance here would translate to a huge distance back home, at faster to whatever their equivalent of a speed of light is.
pocker_machine@lemmy.world 3 days ago
Ah that’s interesting. I didn’t think of them as separate universes.
My point still holds though. I mean, we call 3D as 3D because of 1D and 2D. Since they don’t exist in our reality (but of course they are mathematically useful). One could still argue that since it cannot be perceived, it’s not real.
May be this is some form of nihilistic thought too 🙂
givesomefucks@lemmy.world 3 days ago
No, we call it 3d because there are three physical dimensions we move thru: front/back, side to side, up and.
We experience time linearly, so it’s not included. However time behaving like the three other dimensions isn’t precluded by a single law in physics. Literally everything works backwards just as fine as forwards, except consciousness. We need the cause/effect of linear time to be conscious.
Think of it like fireworks. There can be multiple in your field of view at once.
Each firework is a universe, with its own unique laws of physics and number of physical dimensions. Multiple are still “real” at the same time, even if they’re incredibly unlikely to interact.
I mean, one of the leading theories on how a universe forms is there’s giant “planes” randomly bumping into each other. On that scale not only are multiple universes “real” we’re all completely inconsequential and incredibly fleeting. Not just as individuals, species or even planets. Entire universes don’t matter.
If you’re interested there’s a lot to learn about with all that stuff, but it honestly doesn’t really matter.
pocker_machine@lemmy.world 3 days ago
I never thought of it like that. I thought laws of physics as laws of evening. Nice thought. Thanks for response.