Double slit experiment doesn't work

  1. I took a piece of carton and cut out to strands in it. When I shine the line through it, it only projects the two strands on the other side. I tried it with every light in my house but it still didn't work. what do I have to do, to create the wave interference pattern on the other side.
    Thank you
     
  2. jcsd
  3. mathman

    mathman 6,462
    Science Advisor
    Gold Member

  4. jtbell

    Staff: Mentor

    It's difficult to demonstrate two-slit interference with ordinary light sources because they're incoherent and emit a mixture of wavelengths. Have you tried a laser? A cheap laser-pointer should do the job OK.
     
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