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I propose a simple thpught experiment;
A scientist A measure the spin of an electron and finds it "up". After that he removes all evidence of his experiment and goes away, only to die in a road accident.
Another scientist, obviously unaware of the experiment done by A come and measures the spin of the same electron. Will B find the spin necessarily "up" or he will measure just any value "up" or "dpwn" with equal probability?
If the wave function collapsed by A is an objective reality, B should also measure the same value of the spin (up). Otherwise the experiment of B will be unaffected by the experiment of A, because he does not know anything about it.
Will anybody please enlighten me?
A scientist A measure the spin of an electron and finds it "up". After that he removes all evidence of his experiment and goes away, only to die in a road accident.
Another scientist, obviously unaware of the experiment done by A come and measures the spin of the same electron. Will B find the spin necessarily "up" or he will measure just any value "up" or "dpwn" with equal probability?
If the wave function collapsed by A is an objective reality, B should also measure the same value of the spin (up). Otherwise the experiment of B will be unaffected by the experiment of A, because he does not know anything about it.
Will anybody please enlighten me?