I've been racking my brain to no end trying to feed my crack physics fix. I've even managed to abandon sleep and school work to indulge in this addiction. :tongue: Anyways Am I looking at this right? I just want some sort of guidance so I'm going in the right direction with this....... When a particle-wave is interfered with and behaviorally becomes a particle (collapsed wave function) - it seizes to interfere with itself thus not exhibiting wave properties. So the act of measuring causes a photon/ electron to still retains all of its properties it just looses its ability to interfere with it self,which means it passes through only one hole.... and here I'm sort of iffy on a couple of things... I understand the uncertainty principle, but I do no see how that explains the particle-waves behavioral change in going threw one slit or the other. ... is it just probabilistic at that point slit 1 or slit 2? I also assume that a collapsed wave function is irreversible? ...from my understanding the photon/electron still makes its way to the screen except no diffraction and interference patterns... so how/why does it travel exactly? from the momentum carried from its particle-wave "trip"? or is this something unmeasurable due to HUP? Also is there room for HUP and for the conscious observer to co-exist in explaining particle-wave duality? (something interesting to read on the topic) http://www.ati.ac.at/~summweb/ifm/pc_experiments/Qu_Ant&Butterf.pdf Thanks for the help...if possible could I get comments or answers not so heavy on the math, or more preferably along side it so I can "follow along"