I need to recreate this experiment. It doesn't have to be exactly the same, nor does it have to use very high tech and expensive equipment, it just has to be able to demonstrate interference patterns created by light. I cannot find any specifications on how to build this experiment, and I don't want to make any guesses on specifications while building it, so I need some help. First and foremost, what kind of light should I use? Then, what dimensions should the slits be, and how far should the slits be away from the light. From what I understand, Thomas Young used photographic plates to capture the interference patterns. Would regular 35mm film work? Lastly, I read that if you tried to use a device to determine which slit a photon went through, the interference pattern would not form. Would it be possible to demonstrate this aspect of the double slit experiment without expensive equipment. I don't want to spend a lot of money, so please keep that in mind when posting your answer. Thanks.