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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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Single Photon Interference. What happens when single photons of light pass through a double slit & are detected by a photomultiplier tube? Science!
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Hits: 6231 | Favorites: 1 | Emailed: 0 | Rating: 3.1 | Category: Science | Date: 03/14/2013
 
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OldOllie
Male, 60-69, Midwest US
 12984 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, 70 & Over, Western US
 1778 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, 50-59, Canada
 24196 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
 355 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, 60-69, Midwest US
 12984 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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