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A gear that i don't know its name

  1. Dec 21, 2012 #1
    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
     
  2. jcsd
  3. Dec 21, 2012 #2

    HallsofIvy

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    A very weak source of light will do that!
     
  4. Dec 21, 2012 #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?
     
  5. Dec 21, 2012 #4
    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
     
  6. Dec 21, 2012 #5

    Drakkith

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    Uhh, what?
     
  7. Dec 22, 2012 #6

    256bits

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    The source could be turned down low enough so the emmision is practically single photons.As they say in Wikipedia,
    http://en.wikipedia.org/wiki/Double-slit_experiment
     
  8. Dec 22, 2012 #7
    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: Dec 22, 2012
  9. Dec 27, 2012 #8
    any answer??
     
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