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There isn't much concrete information about concrete either! []We tend to think in very tangible terms. Our senses tell us the world around us has a lot of substance. But when you we get to sufficiently small scales we discover that even things like concrete are mainly empty space, because atoms are mainly empty space.This suggests to me that matter owes its existence to properties of space. Particles may only be energy encapsulated by space. Photons are only energy propagating through space. However, I have no evidence (concrete or otherwise) to support this speculation!If the above is even slightly true, it's hardly surprising that space is so elusive. We could be trying to examine space when we, and all our tools, are made from space itself.
Photons aren't the only energy in spacetime.. take the gluon for example.
Quote from: Mr. Scientist on 27/11/2009 21:18:13Photons aren't the only energy in spacetime.. take the gluon for example.Absolutely Mr. S., and not only the gluon but a mirid of other idenities. For this reason I choose to understand this menagerie of particles to be composed of the same basic stuff. The same basic stuff interacting with the geometry of space/time producing objects of different character because of this geometry. Particles only appear to be different because the geometry of space/time shows us different angles of observation. When we truly understand this geometry, the gigsaw puzzle with be completed.
Quote from: Geezer on 27/11/2009 21:10:30There isn't much concrete information about concrete either! []We tend to think in very tangible terms. Our senses tell us the world around us has a lot of substance. But when you we get to sufficiently small scales we discover that even things like concrete are mainly empty space, because atoms are mainly empty space.This suggests to me that matter owes its existence to properties of space. Particles may only be energy encapsulated by space. Photons are only energy propagating through space. However, I have no evidence (concrete or otherwise) to support this speculation!If the above is even slightly true, it's hardly surprising that space is so elusive. We could be trying to examine space when we, and all our tools, are made from space itself. Photons aren't the only energy in spacetime.. take the gluon for example.
I completely agree with you Ethos. All of these particles are simply different manifestations of some wonderfully simple structure that we do not comprehend - just don't ask me to prove it! I think this was where string theory was going but, to my mind, it became over complicated. Nature tends towards the simplest solution. My hunch is that space is no different.
Gluons have not been observed. It is not needed to understand nuclear binding forces; in fact it gets in the way of understanding nuclear binding forces.