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Old 02-12-2005   #9 (permalink)
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Re: between atoms

In general the uncertainty principle applies to everything but it is only noticeable for subatomic particles. Single atoms can now be manipulated so they are directly observable (for example with scanning tunneling microscopy).

But there is a semantic problem here. If we ask "is there space between the atoms" and meaning "is there a separation between them" then that would depend on the location of the atoms, so it's not easy to answer. In moledules atoms are tighly bound together.

But what is "space"? If the question is "does space consist of atoms" then the answer is no - between single atoms there is only vacuum. This vacuum however has quantum properties and also consists of huge amounts of cosmic radiation (like Tinny pointed out). So whether it is a true vacuum or not is a difficult thing to answer.


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