| Topic: |
Science > Physics |
| User: |
"Neil W" |
| Date: |
27 Feb 2006 07:44:25 PM |
| Object: |
silly particle question? |
I imagine this has been asked before and I hope this isn't too silly a
question. When you read of experiments where they say that "one photon" or
"one electron" is shot at a target. How in the world could they possibly
know that it is a single photon or electron? How can they possibly control
it? Isn't it pure speculation?
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| User: "Sam Wormley" |
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| Title: Re: silly particle question? |
27 Feb 2006 09:34:58 PM |
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Neil W wrote:
I imagine this has been asked before and I hope this isn't too silly a
question. When you read of experiments where they say that "one photon" or
"one electron" is shot at a target. How in the world could they possibly
know that it is a single photon or electron? How can they possibly control
it? Isn't it pure speculation?
See: http://www.google.com/search?q=counting+photons
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| User: "RP" |
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| Title: Re: silly particle question? |
27 Feb 2006 09:56:58 PM |
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Sam Wormley wrote:
Neil W wrote:
I imagine this has been asked before and I hope this isn't too silly a
question. When you read of experiments where they say that "one
photon" or "one electron" is shot at a target. How in the world could
they possibly know that it is a single photon or electron? How can
they possibly control it? Isn't it pure speculation?
See: http://www.google.com/search?q=counting+photons
Especially this one:
http://www.citebase.org/cgi-bin/fulltext?format=application/pdf&identifier=oai:arXiv.org:quant-ph/9712001
Richard Perry
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| User: "tj Frazir" |
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| Title: Re: silly particle question? BUSTED |
27 Feb 2006 10:22:13 PM |
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The hole in the microwave door drillled out so
a microwave will fit is one photon .
2 microwve photons woun fit threw the hole.
You can drill any sise hole and smaller holes exsist in things .
Look at the frequency of the single hole wave .
from top to bottom is one photon .
Any photon may rise the curent .
The frquency x the wavelength equals c.
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| User: "RP" |
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| Title: Re: silly particle question? |
27 Feb 2006 10:18:01 PM |
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RP wrote:
Sam Wormley wrote:
Neil W wrote:
I imagine this has been asked before and I hope this isn't too silly
a question. When you read of experiments where they say that "one
photon" or "one electron" is shot at a target. How in the world
could they possibly know that it is a single photon or electron? How
can they possibly control it? Isn't it pure speculation?
See: http://www.google.com/search?q=counting+photons
Especially this one:
http://www.citebase.org/cgi-bin/fulltext?format=application/pdf&identifier=oai:arXiv.org:quant-ph/9712001
Also of interest:
http://irims.org/blog/index.php/questions/2004/09/25/questions_welcome
Richard Perry
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| User: "RP" |
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| Title: Re: silly particle question? |
27 Feb 2006 08:32:51 PM |
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Neil W wrote:
I imagine this has been asked before and I hope this isn't too silly a
question. When you read of experiments where they say that "one photon" or
"one electron" is shot at a target. How in the world could they possibly
know that it is a single photon or electron? How can they possibly control
it? Isn't it pure speculation?
In the case of electrons you can count tracks in a bubble chamber or
scintillations on a monitor fairly easily. Photons OTOH can't be
counted, they can only be estimated by counting scintillations or tracks
made by recoiling electrons, and by then assuming that a single photon
caused the recoil. But then I'm biased, IMO there is no such thing as a
photon.
Richard Perry
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