another double slit question - noob :( Hi guys, I never officially studied physics so my knowledge on the topic is limited. My understanding of quantum physics in relation to the double slit experiment is the following: When you only observe the end result of light, it appears as if it interferes with itself, suggesting its a wave. But when you observe light mid-travel, it collapses into a particle. My question: Is it the act of conscious measurement that collapses the wave, or is it simply the fact the light has left a "mark", Regardless of conscious observers or not. I understand my terminology may be incorrect, and I might be missing some fundamental information. But, please give it a crack. I would appreciate answers in direct response to my question, and on the broader sense of quantum physics.