If there’s anything to see the quantum state has collapsed. The universe is the observer, an emitted photon is an example of an event that will be observed
That is why only tiny things and things near absolute zero exhibit quantum effects
This comment might be simplified too far to be close enough to accurate.
skeptomatic@lemmy.ca 2 years ago
I believe the measuring apparatus “sees” the outcome and causes the collapse of the wave function. Then the results would look the same to 2 human observers. Apparently there’s some debate amongst physicists on what constitutes an “observer”.