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Double slit interference with single pencil lead?

  1. May 14, 2012 #1
    Hi guys,

    Was trying out a home made double slit experiment as I've seen on youtube with a laser pointer and 2 pieces of pencil lead. Then I realized that I can obtain the same interference pattern with the single pencil lead.

    Is this equivalent to a double slit interference?
  2. jcsd
  3. May 14, 2012 #2
    A single slit or an obstruction would create a diffraction pattern, not an interference pattern.

    Here's a great site to explain the differences...

    http://www.lightandmatter.com/html_books/lm/ch32/ch32.html [Broken]
    Last edited by a moderator: May 6, 2017
  4. May 14, 2012 #3


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  5. May 14, 2012 #4


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  6. May 15, 2012 #5
    thanks for the links! will read them up :)
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