Quote:
Originally Posted by jbjb
The double-slit does indeed show the things you say, but in addition to that it does show the effect of the observer on wave function collapse - if the experimenter adds a detector to determine which slit a given particle goes through, the interference pattern disappears (indicating, per the Copenhagen interpretation, wave function collapse).
/JB
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But again, it's interaction with the detector that causes the wave function to collapse, not the presence of the observer. The wave function will collapse regardless of the presence of the observer; all that's required is the presence of the detector.