Is Space Really a Vacuum and Does it Determine the Size of the Universe?

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SUMMARY

The discussion centers on the nature of vacuum in space and its implications for the universe's size. Participants clarify that a vacuum is not truly empty, referencing experiments that demonstrate the presence of virtual particles and fields. The conversation emphasizes that the concept of vacuum does not directly determine whether the universe is infinite or has an edge. Key insights include the distinction between vacuum and emptiness, and the relevance of string theory in understanding these concepts.

PREREQUISITES
  • Understanding of vacuum fluctuations in quantum physics
  • Familiarity with string theory concepts
  • Knowledge of cosmology and the universe's structure
  • Basic principles of particle physics
NEXT STEPS
  • Research vacuum fluctuations and their implications in quantum mechanics
  • Study string theory and its explanations of the vacuum state
  • Explore cosmological models regarding the universe's edge and infinity
  • Investigate the role of virtual particles in quantum field theory
USEFUL FOR

Physicists, cosmologists, and anyone interested in the fundamental nature of space and the universe's structure.

pikapika!
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if a vacuum is really absoloutly nothing wouldn't that mean there is no edge of of the universe and so the universe is infinite.
 
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pikapika! said:
if a vacuum is really absoloutly nothing wouldn't that mean there is no edge of of the universe and so the universe is infinite.


The vacuum is NOT empty...it is a common mistake to think that. Besides, we even have experiments that prove, the vacuum is not empty...

https://www.physicsforums.com/journal.php?s=&action=view&journalid=13790&perpage=10&page=2

scroll down until you come at the "string theory part 1"-entry and read to first two paragrafs. they will explain you why the vacuum is not empty...

enjoy

regards
marlon
 
Last edited by a moderator:
And whether or not a vacuum is nothing is irrelevant to whether or not the universe is infinite.
 
russ_watters said:
And whether or not a vacuum is nothing is irrelevant to whether or not the universe is infinite.
well, I think he was eluding to the idea that space is a vacuum and he sort of connected space and the universe together...
 

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