How do we know they behave differently when they’re observed in general? I know they can tell they’re being observed by interacting with the detector but how do we know that their behavior changes?
In: Chemistry
We observe them *later*, and we see them doing things that they could not have done while observed.
The simplest experiment is to say that if we have two windows for the electron to pass through. We know where it will land if it flies through one window or the other, and if we place a detector in the window then we get exactly the result we’d expect. We detect the electron in that window and then it lands where we’d predict it land if it passed through that window.
But if we don’t put a detector in the window, the electron can land somewhere different – somewhere that it wouldn’t be able to land if it only passed through one window or the other. We’re still detecting it, downrange of the windows, but not *in* the windows where the weirdness happens.
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