Algodoo

Shoot some electrons through two slids, what happens? If you detect the electron's positions when they hit a screen behind the two slids, then you might find a pattern, there will be two blurry spots on the screen if it's a particle, and many blurry spots when it's a wave. Let's go back to the two slids, the output might result in a wave, but assume if we observed each particle going through the slids, this time, it will look like a particle. This is due to the particle-wave parity. In which we observe a particle, that behaves like a wave, that then will colapse to a particle. I put lazers indicating some of the paths that the particles could take.