2 slit, double slit, two slit I saw a previous topic where someone asked if anyone has tried the 2 slit experiment with bigger objects (not Bucky balls) like sand or golf balls, but it seems not? I wondered if the diffraction patterns could simply be a result of the particles deflecting off the edges of the slits? Also what is the nature of the source of the particles, is it a single point source of light or electrons that 'sprays' across the area of the 2 slits? And how are the slits cut in the material? With sharp flat edges or angled? Maybe double slits in a single layer gold leaf film would be good to try? Perhaps gravity could be the force to propel sand or some other macro particles through slits: just pour it down in a stream. I guess the size/velocity ratio might disallow the necessary deflections required to make a pattern though?