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Thread: Minor question

  1. #1 Minor question 
    Forum Freshman
    Join Date
    Feb 2008
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    Now I am completely ignorant of science, I can't tell a photon from an electron.

    Anyway, I just got one question about that really basic experiment with the photon being in two places at once, How do they know the photon didn't just split into two and go through both slits that way?


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  3. #2  
    Forum Radioactive Isotope MagiMaster's Avatar
    Join Date
    Jul 2006
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    3,440
    Interference. Basically, if you fire a wave through two slits you get an interference pattern. If you fire particles, you don't. When you fire just a single electron at a time through the double slits, you still get an interference pattern, even though you can measure that only one electron came through (destroying the pattern in the process). I'm sure there are other ways to tell, but that's what I can come up with off the top of my head.


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