Quote (Belarathon @ Aug 29 2015 03:24am)
Most of us know that everything around us, including ourselves, is made up of trillions of tiny constituents called atoms. Words like electron, proton and neutron are familiar to us as the even smaller particles that make up the atoms. But what of the rest of the atom? Atoms are 99.9999999999999% empty space. Permeating this empty space are the invisible forces that hold the atom together, namely electromagnetic and nuclear force.
So if atoms are almost entirely empty space, and we are made up purely of atoms and invisible forces acting upon these atoms... then are we not also almost entirely empty space? And if so, why do physical objects feel as though they have such substance and mass? To say that everything that makes up the earth is 99.999999999999% empty space seems impossible to our intuition and senses.
"Things are not empty space. Our classical intuition fails at the quantum level.
Matter does not pass through other matter mainly due to the Pauli exclusion principle and due to the electromagnetic repulsion of the electrons. The closer you bring two atoms, i.e. the more the areas of non-zero expectation for their electrons overlap, the stronger will the repulsion due to the Pauli principle be, since it can never happen that two electrons possess exactly the same spin and the same probability to be found in an extent of space.
The idea that atoms are mostly "empty space" is, from a quantum viewpoint, nonsense. The volume of an atom is filled by the wavefunctions of its electrons, or, from a QFT viewpoint, there is a localized excitation of the electron field in that region of space, which are both very different from the "empty" vacuum state.
The concept of empty space is actually quite tricky, since our intuition "Space is empty when there is no particle in it" differs from the formal "Empty space is the unexcited vacuum state of the theory" quite a lot. The space around the atom is definitely not in the vacuum state, it is filled with electron states. But if you go and look, chances are, you will find at least some "empty" space in the sense of "no particles during measurement". Yet you are not justified in saying that there is "mostly empty space" around the atom, since the electrons are not that sharply localized unless some interaction (like measurements) takes place that actually force them to. When not interacting, their states are "smeared out" over the atom in something sometimes called the electron cloud, where the cloud or orbital represents the probability of finding a particle in any given spot." Source:
http://physics.stackexchange.com/questions/126512/why-doesnt-matter-pass-through-other-matter-if-atoms-are-99-999-empty-spaceQuote (Belarathon @ Aug 29 2015 03:24am)
I guess fundamentally this means you turn a universe dominated by empty space into a universe teeming with life and beauty simply by existing in this dimension and being aware of your surroundings. Such is the power of your consciousness. By definition I suppose this would mean we are all gods. Neat!!
Psychologically, we are gods of our subjective experience. We experience reality through our senses. To an individual, reality is what the mind believes is real.
This post was edited by NatureNames on Sep 19 2015 03:14am