Scott Posted September 7, 2004 Share Posted September 7, 2004 I was wondering if it would be possible to contain a photon for a long amount of time. Possible contain it in a mercury buble in a vaccum (im only 14 so im no physicist)? By the way, Im asking because i have an excellent idea that exploits the entanglement theory, but i need to read the polarity of the photon and be able to contain it for a long amount of time. Thanks. Link to comment Share on other sites More sharing options...
Thales Posted September 7, 2004 Share Posted September 7, 2004 It depends what you mean by contain. If you have a perfectly reflective surface you can hypothetically contain the photon indefinately. You could 'select' the polarity of the photon before 'inserting' it into you system, but taking a measurement without effecting the photon's overall energy would be difficult. You could use a polarising reflecter however. Link to comment Share on other sites More sharing options...
ydoaPs Posted September 7, 2004 Share Posted September 7, 2004 what is the deal with all the 14 year olds? Link to comment Share on other sites More sharing options...
pulkit Posted September 7, 2004 Share Posted September 7, 2004 Once you put it in an optical fibre, thats also "containment". (You could go and put a loop in the fibre) Link to comment Share on other sites More sharing options...
Scott Posted September 7, 2004 Author Share Posted September 7, 2004 thanks guys. Never thought of the fibre. Im almost 15 . Link to comment Share on other sites More sharing options...
5614 Posted September 7, 2004 Share Posted September 7, 2004 just to make sure. its not fibre, its fibre optics, thats like a wire with glass inside... not meaning to insult you, just to make sure, you said "fibre" its fibre optics. Link to comment Share on other sites More sharing options...
5614 Posted September 7, 2004 Share Posted September 7, 2004 getting it in there would be a problem and you would have to complete the ring of fibre optic cable before the photon came around to the other side which would be very hard, and fibre optic cable is very expensive, you wouldnt wanna buy some massively long amount just so that you could shut it in time. Link to comment Share on other sites More sharing options...
pulkit Posted September 7, 2004 Share Posted September 7, 2004 getting it in there would be a problem and you would have to complete the ring of fibre optic cable before the photon came around to the other side which would be very hard, and fibre optic cable is very expensive, you wouldnt wanna buy some massively long amount just so that you could shut it in time. You can try and directly put the photon into the loop, you needn't go about trying to close the loop, that'll be impractical. Link to comment Share on other sites More sharing options...
Scott Posted September 7, 2004 Author Share Posted September 7, 2004 i knew it was fibre optics, (like t3). Hmmm, I may need to wait for college to do this. By the way, would any of you know how to excite an atom to release the entangled photons. I guess applying heat might but Im not entirely sure. Link to comment Share on other sites More sharing options...
5614 Posted September 7, 2004 Share Posted September 7, 2004 when a photon hits an electron, then the electron becomes excited and jumps to a higer state, after a certain amount of time the electrons then emits a photon and jumps back down to its original lower state, i dont know if this could be done with a entagled photon as the photon would interact and the entagle bond would be broken. Link to comment Share on other sites More sharing options...
Scott Posted September 7, 2004 Author Share Posted September 7, 2004 i thought i read somewhere that sometimes entangled photons are released from excited atoms. But i could be wrong. Link to comment Share on other sites More sharing options...
5614 Posted September 7, 2004 Share Posted September 7, 2004 entaglement is a process of linking atoms.... it does not just happend when a photon is released from a previously excited atom. there's a thread on quantum entaglement in quantum mechanics, although i was wrong at first, read the whole thing if you are dedicated and interested.... beleive swansont, he's always right, hes a Dr in atomic physics, he knows [everything!] Link to comment Share on other sites More sharing options...
Scott Posted September 7, 2004 Author Share Posted September 7, 2004 ok, i guess i better research more. I probably sound pretty ignorant . Link to comment Share on other sites More sharing options...
5614 Posted September 7, 2004 Share Posted September 7, 2004 s'ok man, seriously, read that thread, at the beggining i thought i knew my stuff; http://www.scienceforums.net/forums/showthread.php?t=4498&page=1 you really must read it all though, i was wrong at first, you could get confused... post a question there if you dont get it. Link to comment Share on other sites More sharing options...
Scott Posted September 7, 2004 Author Share Posted September 7, 2004 hmmm, i read all the way through admirals big post. Im kinda confused. So i guess the quantum systems of the photons are entangled and not the photons them selves (if i interpreted that correctly) . That pretty much all i got. I'll re-read it again later, once my brain recouporates. Cheers. Correct me if my interpretation was wrong. Link to comment Share on other sites More sharing options...
5614 Posted September 7, 2004 Share Posted September 7, 2004 um, well done for reading it, whilsts i created that thread with the aim of understanding quantum teleportation [which i now do] i still had to learnt about quantum entaglement. what i think you were trying to say was that the actual photons themselves were not entagled, the properties of the photons are entagled, which is right read on to the other pages, dont worry about admirals long one! remember swansont is always right, i agrued with him oops, neva gonna do that again, and so did someone else, in this thread swansont is always right... and i think he will be in all you ever read! Link to comment Share on other sites More sharing options...
Scott Posted September 7, 2004 Author Share Posted September 7, 2004 Ok, cool. BTW, this is a nice forum. Its very active. Link to comment Share on other sites More sharing options...
5614 Posted September 7, 2004 Share Posted September 7, 2004 it is isnt it, unforutunately the chatroom isnt soo active, if you go into now, im there.... click the link on the top Link to comment Share on other sites More sharing options...
Scott Posted September 7, 2004 Author Share Posted September 7, 2004 Ok, i'll probably drop in every once and a while if i dont have any homework or anything. EDIT: This is a reply to post 20 (i didnt want to make another post to be deleted ) Ok, I guess those moderators are obligated to do their daily sweeps . Link to comment Share on other sites More sharing options...
5614 Posted September 7, 2004 Share Posted September 7, 2004 ok, just to say when a moderator comes they will delete the last few posts are they are innapropriat to the topic in this thread, this is good decision and helps keeps SFN the good place it is.... dont be suprised if this isnt hear tomorrow. [thats our chat, not the proper stuff!] post 17, 18, 19 + 20 maybe 17 will stay, 18 - 20 will certainly go Link to comment Share on other sites More sharing options...
swansont Posted September 7, 2004 Share Posted September 7, 2004 entaglement is a process of linking atoms.... it does not just happend when a photon is released from a previously excited atom. You'd have to have two photons emitted from a single transition. (probably a necessary but not sufficient condition for entanglement) there's a thread on quantum entaglement in quantum mechanics, although i was wrong at first, read the whole thing if you are dedicated and interested.... beleive swansont, he's always right, hes a Dr in atomic physics, he knows [everything!] Not everything, and not always. Link to comment Share on other sites More sharing options...
5614 Posted September 9, 2004 Share Posted September 9, 2004 is it possible for a single electron to release two or more photons when switching from higher to lower engergy state? Link to comment Share on other sites More sharing options...
MolecularMan14 Posted September 9, 2004 Share Posted September 9, 2004 what is the deal with all the 14 year olds? Ah, but ya gotta respect our spunk. lol. Link to comment Share on other sites More sharing options...
5614 Posted September 9, 2004 Share Posted September 9, 2004 there's not that many 14 year olds, although maybe relatively it seems many, probably also younger people are more often on the site, grown ups may not always give away their age and go onto threads labelled 'whats you age?' and youdadonapogos and anti-mokey, im not 14! Link to comment Share on other sites More sharing options...
swansont Posted September 9, 2004 Share Posted September 9, 2004 is it possible for a single electron to release two or more photons when switching from higher to lower engergy state? Yes. e.g. if the transition has a change of 2 units of angular momentum (like a D to S state transition), the transition cannot happen with a single photon. Such a transition would have a long lifetime, and the atom would preferentially decay via another channel, if a more direct one is available. Link to comment Share on other sites More sharing options...
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