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One particle at a time

  1. Mar 31, 2009 #1
    I have read that physicist have been able to do the double slit experiment in which they were able to release one photon or one electron at a time. How is this possible? How would a person know that only one photon or one electron had been released? And how is this done?
  2. jcsd
  3. Mar 31, 2009 #2


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    (where did you read this? Why do always people forget to tell this important information)

    One simple adjust the beam so that without the slits a desirable hit frequency is obtained on a big screen. Then one installs the slits, and hope that the same frequency is still there
  4. Mar 31, 2009 #3


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    When I did this in a course a couple years back with a double slit and a lightbulb, we just used some very ... "powerful" filters to decrease the intensity a tremendous amount. Then we proceeded to use more then 1 :).
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