>>15290406Various experiments from the early 19th and 20th century demonstrate that light and even small particles like electrons produce wave-like diffraction/interference patterns when passed through a pair of fine slits. However, if a method of electronic detection is applied which is sufficiently perturbative to detect which slit individual particles have passed through, the interference pattern collapses, and regardless of whether the pattern collapses or not the light, electrons, etc are absorbed at discrete points by any detector on the other side.
These experiments display how light and matter exhibit properties associated classically with both waves and particles, a major paradox explained by quantum physics.
Due to decades of poor or incomplete explanations of the experiment, it is often conflated by faggots on the internet as some kind of relationship between the conscious act of observation and the physics of particles, which is complete schizo bullshit.
tl;dr - result changes when observed/measured, implies duality of nature