Is there a perfect vacuum between atoms in space?

AI Thread Summary
The discussion centers on the concept of a perfect vacuum in space and the challenges of achieving it. While space may appear nearly void, it is filled with low-density atoms, making it impossible to reach absolute zero pressure, which is a requirement for a perfect vacuum. The conversation highlights that even on Earth, the space between atoms is not truly empty, as energy fluctuations and virtual particles persist. The Casimir effect illustrates that a vacuum can never be devoid of energy, only matter. Ultimately, the idea of a perfect vacuum remains a philosophical concept rather than a physical reality.
  • #51
Gabe21 said:
yes. it would be matter in the solid form but because of the temp their would be no molecular movement of the atoms. so y wouldent it be a vacuum?

Because there is nothing in the definition of vacuum relating to heat or the vibration of molecules.

A vacuum simply lacks matter. If there is still matter there, then it isn't a vacuum - hot, cold or otherwise.
 
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  • #52
ah. but if temp and pressure are directly linked then when u reach absolute zero shouldent their be a perfect vacuum pressure wise? if no, then is it true if u managed to create a perfect vacuum and introduced a steel ball bearing into that vacuum it would increase the pressure?
 
  • #53
Gabe21 said:
ah. but if temp and pressure are directly linked then when u reach absolute zero shouldent their be a perfect vacuum pressure wise? if no, then is it true if u managed to create a perfect vacuum and introduced a steel ball bearing into that vacuum it would increase the pressure?

A vacuum is defined as an area with no matter in it. Nothing to do with pressure.

Low pressure is simply a side effect of having too few molecules whizzing around.
 
  • #54
A perfect vacuum would be great. Atleast some corrections can be made on most constants.
Though most ppl might consider it useless. But it very useful to us in the elementary world.

By the way, can some1 help me really explain 'michaelson's experiment' in measuring the 'speed of light'? Using prism and glass over a distance, d, and time, t=1/(Nf).
The truth is that I want to carry out that same experiment (exactly the same way).
 
  • #55
jollyPHYSICS said:
By the way, can some1 help me really explain 'michaelson's experiment' in measuring the 'speed of light'? Using prism and glass over a distance, d, and time, t=1/(Nf).
The truth is that I want to carry out that same experiment (exactly the same way).

You need to start your own thread for this.
 
  • #56
fatra2 said:
Hi there,

Alright, but what about all the space between the flowing neutrons, electrons, muons, and neutrinos. There is still a great amount of space left, and therefore, empty space left.

Cheers
I like Einstein on the concept of Empty Space:

Note to the Fifteenth Edition ('Relativity')

"IN this edition I have added, as a fifth appendix, a presentation of my views on the problem of
space in general and on the gradual modifications of our ideas on space resulting from the
influence of the relativistic view-point. I wished to show that space-time is not necessarily
something to which one can ascribe a separate existence, independently of the actual objects
of physical reality. Physical objects are not in space, but these objects are spatially extended.
In this way the concept "empty space" loses its meaning."[/color]

June 9th, 1952 A. EINSTEIN
 
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