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Double slit experiment doesn't work

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itaybrodsky
#1
Dec30-12, 02:56 PM
P: 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
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mathman
#2
Dec30-12, 03:26 PM
Sci Advisor
P: 6,104
http://en.wikipedia.org/wiki/Double-slit_experiment

It depends on the width of the slits and the separation.
jtbell
#3
Dec30-12, 03:34 PM
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P: 11,862
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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