Quantum Mechanics
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Tim Danaher wrote:This is all of the top of my head, but isn't one of the findings of relativity theory that, for a photon, space and time have no meaning? From a photon's perspective, it's everywhere and 'everywhen'. It takes no 'time' to go from A to B and so, for the photon, there's no 'distance' from A to B, which would mean that for the photons in the DS experiment, from their frame of reference, they're all going through the slits 'simultaneously'... I dunno...
twistor59 wrote:Tim Danaher wrote:This is all of the top of my head, but isn't one of the findings of relativity theory that, for a photon, space and time have no meaning? From a photon's perspective, it's everywhere and 'everywhen'. It takes no 'time' to go from A to B and so, for the photon, there's no 'distance' from A to B, which would mean that for the photons in the DS experiment, from their frame of reference, they're all going through the slits 'simultaneously'... I dunno...
The mystery with the double slit experiment is that, even when you fire one photon at a time, they show interference, so each photon "knows" about both slits. However, when you look at them to see if they did indeed go through both slits or not, the whole photon is measured to be at one slot or the other, never at both (and of course the measurement makes the interference pattern disappear). If you feel that the photon's lack of experiencing proper time has something to do with this mystery, it's useful to remember that you get the same effect with electrons, which certainly do experience proper time.
eric8476 wrote:interjection -
is the medium that electrons flow in when shoot out of a source through the slits providing wave behavior of the electrons? and does observing it when it passes through the slits interupt the medium's function. does an electron beam that shoots single electrons at a time have extra discharge when shooting the electrons? what do the elecrtons use to move in the space between the sooting device and the recording device? is this next nobel prize stuff or moot point?
enjoy:
http://www.youtube.com/watch?v=DfPeprQ7oGc&feature=player_embedded
Beelzebub wrote:eric8476 wrote:interjection -
is the medium that electrons flow in when shoot out of a source through the slits providing wave behavior of the electrons? and does observing it when it passes through the slits interupt the medium's function. does an electron beam that shoots single electrons at a time have extra discharge when shooting the electrons? what do the elecrtons use to move in the space between the sooting device and the recording device? is this next nobel prize stuff or moot point?
enjoy:
http://www.youtube.com/watch?v=DfPeprQ7oGc&feature=player_embedded
Hi Eric,
These experiments are conducted in a vacuum, any medium would tend to scatter and absorb the electron beam. Regarding light, well this was a bit of a conundrum in the 19th century - just what was 'waving'? It has been pretty conclusively shown that light (Electromagnetic radiation) doesn't need a medium to travel through (Actually, Maxwell's equations hint heavily at this - a varying magnetic field induces a varying electric field. A varying electric field induces a varying magnetic field.).
I'm not at all sure what you mean with "...an electron beam that shoots single electrons at a time have extra discharge when shooting the electrons"? Are you asking if an extra, invisible, particle is simultaneously emitted along with each individual electron, that subsequently interferes with the electron at the double-slits? What evidence is there of this? What experiment do you think could be constructed to show this? - An exercise for the reader, perhaps!
With regards to "...what do the elecrtons use to move in the space ...", I'm not sure what you are asking here? Classically, a particle, once set in motion, will continue until an external force impinges (Newton's first law of motion). Are you thinking that some external force must be applied continuously in order to keep the electron moving? This would be a naive view of things, to say the least!
when the electrons are shot one at a time, is it in an beam form? that is, are each electron particle shot an independent form of the particle and without something that can be associated with each from the shooting?
the negative charge of the electron and the size of the particle is possibly effecting the movement of the particle through the slits. when water is passed through the slits the bonding forces between the h2o particles effect the motion and influence the movement of the bonded h2o particles after being narrowed down through the slits.
also remember, it has been shown that photons leave a wave pattern after being observed going through the slits.
Beelzebub wrote:...I'm sorry, but I have no idea what you are saying, or asking, here
Beelzebub wrote:All substances exhibit wave properties - not just water and electrons. The size of the particles in the substance makes little difference. Consider the size of the slits compared with the size of the component particles. Charge too, doesn't seem to be a factor, as positive and neutral particles also create wave-like phenomena.
Beelzebub wrote:Err...yes?
Note that photons are particles - no doubt about that at all! It's just that their integrated behaviour exhibits wave-like properties. Perhaps this is telling us more about how we define waves, rather than considering them as, somehow, fundamental?
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