Eigenstates: What would happen if you had a laser aimed at a mirror 45 degrees....... I know this post might fit under some of the other post in this forum but i would like to ask it as a new topic because I am just getting into a lot of Quantum information ever since I noticed this part of the forum, and now i'm hooked! Question: You have a laser aimed at a mirror that is offset by 45 degrees of the lasers original path. In classical physics the laser should reflect off this point perpendicular to it's original path correct? Now when the laser beam gets to the first mirror it's Eigenstates are infinite, it could reflect back at any point of degrees or does reflect back at every point. It's not until the observer looks that it reflects perpendicular. [from what i understand] Now what would happen if you had a bunch of mirrors and just made the beam bounce around in a zig zag type pattern, until it hits a wall at the end. If you isolate the system so that you can only see the wall at the end, then turn the laser on, what would happen? (i think i know what would actually happen) If you "weren't there" to see the laser's first mirror point, would it still reflect perpendicular to it's original path and eventually shine on the wall? Man this stuff is confusing the heck out of me and taking up too much of my free time trying to figure it out!