How can I do the double slit experiment with limited resources?

[rohanprabhu]

The young's double slut experiment is pretty awesome i guess.. i never had thought that light + light could ever equal dark.. so I want to try and do the double slit experiment myself.

For the slits and the curtain.. I'm thinking of using Aluminum foil into which i can cut fine slits with a razor blade. I have around 6-7 meters [lengthwise] free space available. Which makes my D = 7.00 m. If i keep the slits like.. 3 mm across [i doubt if i can get it even that fine].. I get the fringe width as $2333.33\lambda$. So, what wavelength of light should I use? Also, how can i get such a light source?

The problem is that the wavelength I'm getting so that i can see the fringes clearly is to the order of tens of micrometer.. what i need is something in the order of hundreds of nanometer [i guess].. so.. basically.. I'm missing out on a [or two] factor of ten.

any suggestions?

 

[CompuChip]

You might find this PF thread useful, as well as http://www.altair.org/TwoSlit.html .

If you are lazy, you could just contact a nearby university (or maybe even a secondary school) and ask them if you can come by some time and do the experiment... big chance they have the experiment ready-to-go.