Double slit experiment doesn't work

AI Thread Summary
To create a wave interference pattern in the double slit experiment, the width of the slits and their separation are crucial factors. Ordinary light sources are typically incoherent and emit multiple wavelengths, making it challenging to observe the interference pattern. Using a coherent light source, such as a laser, is recommended for better results. A simple laser pointer can effectively demonstrate the phenomenon. Proper setup and equipment are essential for achieving the desired outcome.
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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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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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