OK this question comes from a late-night discussion, er, argument, about the famous double-slit experiment. One of the interesting facts about the double-slit experiment is that the interference pattern that appears on the screen doesn't seem to be affected by the rate at which electrons are fired through the slits. So, even if the electrons (or photons? does it matter?) are fired one at a time, an interference pattern still occurs. So the question that came up in the argument (and we're all non-physicists, by the way), is whether this means the rate of the discharge of particles doesn't effect the pattern. So whether they're discharged one electron at a time, or at a faster (or is that 'higher'?) rate, then you still get the same pattern. That was the point of contention in the debate, but none of the participants have enough knowledge of physics to resolve it, so I thought I would bring it here and ask some people who really would know. Thanks.