Rusty Knight wrote:rkolter wrote:Rusty Knight wrote:That depends on weather it's a vacuum cleaner or the vast vacuum of quantum foam that we call space.
*slaps Rusty Knight*
You fail at science.
Just don't tell the science teacher...
Your science teacher is WRONG. Now I have to educate you.
1) vacuum cleaner vs. vacuum of space
There is no difference between the vacuum a vacuum pump makes, and the vacuum that exists in space. Well, there is a difference - humans can make a better vacuum.
2) vacuum of quantum foam
Your teacher is at least marginally on track here. Vacuum energy - the energy of the ground state of our universe, also called zero-point energy, is the result of virtual particle pairs appearing and annihilating.
This is not however, the same thing as the vacuum of space. The vacuum of space is a vacuum for the same reason that a chamber evacuated of atmosphere is a vacuum. Vacuum energy, and a general lack of matter are not the same thing, even if they use the same word.
3) ... that we call space.
This is simply wrongheaded thinking unless your teacher has perfected the grand unified theory. Vacuum energy is not space (although it may be creating new space...).
While we say space is a vacuum, what we mean is that one characteristic of space is that it is for the most part, devoid of matter. One characteristic, not the only characteristic. You can say Space is a vacuum.
You cannot say This vacuum, which we call space. This is because space has characteristics other than merely being generally devoid of matter.
For a more readily understandable example, consider this:
"This container is empty." (Space is a vacuum).
"This emptyness, which we call a container..." (This vacuum, which we call space)
You have been pwned by science.