A gear that i don't know its name

  • Thread starter cyth0987
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  • #1
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everyone know double slit experiment. my question is about second experi which chanced physics. how do we send photons one by one. which machine is used for that and can i get it from somewhere thanks for your answers
 

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  • #2
HallsofIvy
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A very weak source of light will do that!
 
  • #3
Drakkith
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I wonder if two polarizers placed nearly 90 degrees apart would reduce a light source to nearly single photons?
 
  • #4
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okay we never know a weak source disseminate how much photon and i think it disseminates millions of it. i am waiting for another answers
 
  • #5
Drakkith
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okay we never know a weak source disseminate how much photon and i think it disseminates millions of it. i am waiting for another answers
Uhh, what?
 
  • #6
256bits
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okay we never know a weak source disseminate how much photon and i think it disseminates millions of it. i am waiting for another answers
The source could be turned down low enough so the emmision is practically single photons.As they say in Wikipedia,
A low-intensity double-slit experiment was first performed by G. Taylor in 1909,[6] by reducing the level of incident light until photon emission/absorption events were mostly nonoverlapping. A double-slit experiment was not performed with anything other than light until 1961, when Clauss Jönsson of the University of Tübingen performed it with electrons.[7][8] In 2002, Jönsson's double-slit experiment was voted "the most beautiful experiment" by readers of Physics World.[9]
http://en.wikipedia.org/wiki/Double-slit_experiment
 
  • #7
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okay with your answers and with a few site, i've realized that experi had performed with a very weak source so we have another questions now.
1- can i use every screen for this exp. my cellphone, my telly etc.
2- how can i decrease photons density till i reach one photon
 
Last edited:
  • #8
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any answer??
 

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