Matte

but he’s not saying that the Planck’s length is the pixel size of our universe.

There is a misconception that the universe is fundamentally divided into Planck-sized pixels, that nothing can be smaller than the Planck length, that things move through space by progressing one Planck length every Planck time. Judging by the ultimate source, a cursory search of reddit questions, the misconception is fairly common. There is nothing in established physics that says this is the case, nothing in general relativity or quantum mechanics pointing to it. I have an idea as to where the misconception might arise, that I can’t really back up but I will state anyway. I think that when people learn that the energy states of electrons in an atom are quantized, and that Planck’s constant is involved, a leap is made towards the pixel fallacy. I remember in my early teens reading about the Planck time in National Geographic, and hearing about Planck’s constant in highschool physics or chemistry, and thinking they were the same. As I mentioned earlier, just because units are “natural” it doesn’t mean they are “fundamental,” due to the choice of constants used to define the units. The simplest reason that Planck-pixels don’t make up the universe is special relativity and the idea that all inertial reference frames are equally valid. If there is a rest frame in which the matrix of these Planck-pixels is isotropic, in other frames they would be length contracted in one direction, and moving diagonally with respect to his matrix might impart angle-dependence on how you experience the universe. If an electromagnetic wave with the wavelength of one Planck length were propagating through space, its wavelength could be made even smaller by transforming to a reference frame in which the wavelength is even smaller, so the idea of rest-frame equivalence and a minimal length are inconsistent with one-another.

Reference: https://www.physicsforums.com/insights/hand-wavy-discussion-planck-length/

can you post a source for this?

but atoms are made by particles, and particles are made by gluons, which are made of… strings? quantum foam? we haven’t hit rock bottom yet.

isn’t the most recent explanation on planck’s length saying that we simply can’t observe further down, but it is hypothesised that smaller lengths actually exist?

but time is relative. we might very well live in a simulation that takes a minute of “external time” to compute a single tick of our time. we just can’t experience it.

really!! I love it. They should just crop the top and the bottom and it would be magnificent

a little OT: what’s that AI summary thing that takes a summary from news sites of different political view?? the concept sounds incredibly cool, but is it reliable?

sublemmy / subs. easy enough.

but why bother? they can still enter from any of the thousands of other instances that allow free registration. if they want to troll, they are still able to do that.

I don’t understand: did something serious happened, or it’s them overreacting?

ohhhh this is interesting!!

There’s the junkification of Amazon and the enshittification of TikTok.

wait, I thought TikTok was enshittified by design?