”The mere act of observing the bead at one moment in time changes where it will be at a later moment when the laser shines the second time. If the rules of quantum mechanics hold, the bead may sometimes be found at B, but sometimes it won’t be.”
”The mere act of observing the bead at one moment in time changes where it will be at a later moment when the laser shines the second time. If the rules of quantum mechanics hold, the bead may sometimes be found at B, but sometimes it won’t be.”