How come measuring something changes it? How does an inanimate object know it’s being observed, to change spin or direction?
Isn’t that like saying a ruler has no length until I look at it, then it suddenly has length, or a rock has no weight until one looks at it...I don’t understand that principle.
Ed
The first one I understand. If you measure something, then you’ve got to touch it to do so, if only with a light beam. When you touch it, it moves (changes). But the idea that when you touch it, it sends an instantaneous message to another “entangled” object on the other side of the universe, and that object also changes, is difficult to accept. Yet, that is the theory. And the theory is generally accepted by most physicists. The “proof” is statistical.
Part of my skepticism is due to the fact that I don’t put much stock in statistics. The conclusions of statistical studies generally assume that you understand the mathematical structure of the phenomena you are studying. You’re just trying to measure the parameters. But in this case, you are actually trying to identify the mathematical structure of the phenomena you are studying.