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Single Photon Interference

What happens when single photons of light pass through a double slit & are detected by a photomultiplier tube? Science!

submitted by: ElectricEye

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Hits: 6086 | Favorites: 1 | Emailed: 0 | Rating: 3.3 | Category: Science | Date: 03/14/2013

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OldOllie Male, 50-59, Midwest US 8751 Posts	Friday, March 15, 2013 8:27:43 PM @handimanner Firesign Theater? Really? Wow! You really ARE as old as you claim to be.

handimanner Male, 50-59, Western US 1206 Posts	Friday, March 15, 2013 11:35:00 AM How can you be in two places at once if you are really nowhere at all? Firesign Theater

5Cats Male, 40-49, Canada 16973 Posts	Friday, March 15, 2013 8:53:53 AM electrons will do the same thing. lolz @OldOllie: Electrons do a lot more "weird things" too! Naughty little blighters! I read your post on the AGW thread (Mar.10 iirc) Very well done! [quote]How can we be sure it's a single photon every time? And not 2 or 3 that then interfere?[/quote] @paperduck: iirc, there`s a gizmo that only fires 1 photon at a time. They rig it that way and it`s (apparently) easy to check if it`s working properly. The "double slit" experiments are what makes science fun!

10Bears Male, 30-39, Europe 258 Posts	Friday, March 15, 2013 2:40:39 AM I prefer this video on the same subject http://www.youtube.com/watch?v=tu57B1v0SzI

OldOllie Male, 50-59, Midwest US 8751 Posts	Thursday, March 14, 2013 11:26:22 PM How can we be sure it's a single photon every time? And not 2 or 3 that then interfere? The photomultiplier is detecting single photons. Perhaps the best way to visualize it is that the photon travels as a wave, but it interacts as a particle. That`s not exactly what`s going on, but it`s the best way I know to explain it. If you think that`s weird, electrons will do the same thing.

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