Why the universe is most likely not infinite – Part 4: Everything we measure is finite
Alles, was wir messen, ist endlich.
Bäume wachsen nicht in den Himmel, Krypto-Kurse steigen nicht ins Unendliche und das gilt auch für alles andere auf der Welt.
Inzwischen wissen wir, dass auch die Sonne ein Ablaufdatum hat und sogar das Universum wird in dieser Form höchst wahrscheinlich nicht ewig existieren. Es gibt sogar schon zahlreiche Überlegungen, wie das Universum enden könnte. Szenarien reichen von Big Rip über Big Freeze bis zu einem Big Crunch.
Auch die Anzahl der Atome des (sichtbaren) Universums können wir mit 10^80 abschätzen und diese ist nicht unendlich.
Ok, wenn das (sichtbare) Universum nicht unendlich lange existiert und nicht unendlich groß ist, hat es dann vielleicht wenigstens eine unendliche Auflösung?
Vor Kurzem hat der Österreicher Ferenc Krausz mit zwei weiteren Wissenschaftern (Pierre Agostini und Anne L’Huillier) den Physik-Nobelpreis für das Erzeugen von Lichtimpulsen im Attosekundenbereich bekommen.
Das ist auch die kleinste Zeiteinheit (10^-18 s), die man derzeit hypothetisch messen kann.
In einer Attosekunde legt das Licht (im Vakuum) gerade einmal 0.3 Nanometer (nm) zurück.
Im LHC beträgt die kleinste gemessene (abgeleitete) Länge ungefähr 10^-18 Meter, was auch ein Attometer ist und als obere Schranke für die Größe von Quarks und Elektronen gilt.
Selbst, wenn das Universum eine unendliche Auflösung hätte, würde man bei diesen kleinen Einheiten Probleme mit der Quantenphysik und der Heisenbergschen Unschärferelation bekommen.
Im Wesentlichen verhält sich die Position von Teilchen eher wie Wahrscheinlichkeitsfunktionen. Die Position ist gar nicht unendlich genau definiert, sondern wird mit einem Zufallsgenerator erst dann festgelegt, wenn der Wert genau gebraucht bzw. gemessen wird.
Weiters gibt es sogar ein theoretisches Limit für die Auflösung. Die Planck-Länge (10^-35 Meter) und die Planck-Zeit (10^-44 s). Ab da würde man sogar Probleme mit den Naturgesetzen (den mathematischen Modellen) bekommen, die ab dieser Größenordnung nicht mehr sinnvoll anwendbar sind.
Trotzdem wäre eine höhere Auflösung zwar theoretisch denkbar, aber ich vermute, dass die tatsächliche Auflösung des Universums sogar weit über der Planck-Länge liegt und jedenfalls endlich ist.
Was sagt ihr dazu? Denkt ihr, dass das Universum eine unendliche Auflösung hat oder eher, dass es wie bei einem Computermonitor begrenzt (quantisiert) ist?
Is the universe infinite or rather finite? AI-generated illustration (Stable Diffusion)
English
Everything we measure is finite.
Trees don't grow to the sky, crypto prices don't rise to infinity, and the same goes for everything else in the universe.
In the meantime, we know that even the sun has an expiration date and even the universe will most likely not exist forever in this form. There are even already numerous considerations, how the universe could end. Scenarios range from Big Rip to Big Freeze to a Big Crunch.
Also the number of atoms of the (visible) universe can be estimated with 10^80 and this is not infinite either.
Ok, if the (visible) universe does not exist infinitely long and is not infinitely large, maybe it has at least an infinite resolution?
Recently, Austrian scientist Ferenc Krausz together with Pierre Agostini and Anne L'Huillier were awarded the Nobel Prize in Physics for generating light pulses in the attosecond range.
This is also the smallest unit of time (10^-18 s) that can hypothetically be measured at the moment.
In one attosecond, light (in vacuum) travels just 0.3 nanometers (nm).
In the LHC, the smallest measured (inferred) length is about 10^-18 meters, which is also an attometer and is considered an upper bound on the size of quarks and electrons.
Even if the universe had infinite resolution, one would run into problems with quantum physics and the Heisenberg uncertainty principle at these small scales.
In essence, the position of particles behaves more like probability functions. The position is not defined infinitely exactly at all, but is determined with a random generator only when the value is exactly needed or measured.
Further there is even a theoretical limit for the resolution. The Planck length (10^-35 meters) and the Planck time (10^-44 s). From there one would get even problems with the laws of nature (the mathematical models), which are no more meaningfully applicable from this order of magnitude.
Nevertheless, a higher resolution would be theoretically possible, but I even suspect that the actual resolution of the universe is even far above the Planck length and is finite after all.
Do you think that the universe has an infinite resolution or rather that it is limited (quantized) like a computer monitor?
Finite or infinite universe
Part 1: Definitions https://stemgeeks.net/hive-163521/@vikisecrets/why-the-universe-is-most-likely-not-infinite-part-1-definitions-reply-with-infinite-or-finite
Part 2: Scientific question or not? https://stemgeeks.net/hive-163521/@vikisecrets/why-the-universe-is-most-likely-not-infinite-part-2-scientific-question-or-not
Part 3: Infinity as a placeholder for ignorance https://stemgeeks.net/hive-163521/@vikisecrets/why-the-universe-is-most-likely-not-infinite-part-3-infinity-as-a-placeholder-for-ignorance
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I'm sorry to disagree but human stupidity can indeed be infinite.
That's right. :)
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universe is still unknown to us. so my guess is it has infinite resolution.
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"Everything we measure is finite" - true. as long as it can be measured, it has its limit.
I knew from the Big Bang theory that the universe is expanding. But with everything there is a certain period. At some point everything will deviate from its own orbit.
Das Universum ist nur so stark aufgelöst, wie die Rechnerleistung, mit der es simuliert wird, erlaubt.
Haha, ja das hab ich mir auch schon gedacht 😂 Denke, dass es nicht nur mit der Rechenleistung zusammenhängt, sondern der Zufallsgenerator / die Unschärfe wird benötigt, um ein nicht-deterministisches Universum mit komplexen Strukturen und intelligentem Leben zu generieren.
All these logics are true to some extent. We can find universe as finite because one day It will end.
I don't think we can really tell but I think the universe is finite but we can't even figure out how far out it is.
I think it's fascinating to think about the limits of the universe. On the one hand, it's humbling to realize that everything we know is finite. On the other hand, it's also exciting to think that there's still so much we don't know
I just feel that there are so many facts about this universe that we don't know yet
I think that our Universe is finite. Matter was born from a point and scatters in different directions. But there is probably a Multiverse, which consists of different universes (with different constants). Perhaps the Multiverse has an infinite structure.
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Alles kommt aus dem "nichts", alles geht ins "nichts". So denke ich wird es für alles enden.
Die Frage die sich für mich nur stellt, wird es wie einst das Universum gestartet ist, dann auch irgendwann ein "Reboot" geben? Also Universum 2.0 in der Art. Bzw. gab es davor schon welche?
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Determining whether the universe is infinite remains complex, as we lack sufficient knowledge on the matter. Currently, there is no theory that definitively states whether the universe is infinite or finite.
In my opinion, I believe the universe is not infinite; rather, it is too complex to measure.
What we can measure now is definitely finite, but it's what we don't understand that will eventually change everything. We still understand so little about universe, everything is still just taking some good guesses!
One thing I know is since the universe has a begining, it will have an end
Of course, a person thinks that all these things will give him so much profit in his life that he can spend the rest of his life peacefully, but this does not happen at all. To live a good life, you have to work hard day and night.