A gear that i don't know its name

[cyth0987]

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

 

[HallsofIvy]

A very weak source of light will do that!

 

[Drakkith]

I wonder if two polarizers placed nearly 90 degrees apart would reduce a light source to nearly single photons?

 

[cyth0987]

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

 

[Drakkith]

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?

 

[256bits]

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

 

[cyth0987]

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

 

[cyth0987]

any answer??