A few question about the double slit experiment... I have watched many videos and discussions about this experiment and am curious if anyone has ever varied the slits... What happens if one slit is vertical and one horizontal? If they are closer together or further apart? One fat and one skinny? One tall, one short? etc etc... How about three slits? or maybe concentric circular slits? I would imagine that this has been done and the results unremarkable but I have not heard or read anything other that one or two slits... How about two emitters side by side with zero slits? Would an interference pattern result?