3 ms·

>Then you check again You only get to check once, I think. The rest doesn't matter, supposedly.

• Jensson 3y ago
  That is false, it changes every time you check along another axis. If you make the same check it doesn't change, but if you change what you check then you can update the particle as my example shows. Changing a particle like this by making repeated measurements is a standard example in undergrad quantum mechanics. Edit: There is always a part of the particles state that you can't know, you know Heisenberg's indeterminacy principle, so if you measure position you now makes velocity undetermined, and then if you measure velocity now you make position undetermined, and then if you go back and try to measure position the particle will be in a new random spot.
  • trimethylpurine 3y ago
    So if you check that the gloves are black they are black every time you check (axis 1). And then if you check that they have five fingers, they have five fingers every time(axis 2). So, it sounds exactly like a "gloves in a box" example, right? I'm not trying to be cheeky, I'm just pointing out that the example really does sound analogous, as stated so far.
    • Jensson 3y ago
      It depends on how those states interact with each other. Lets say you can't know a gloves fingers and a gloves color at the same time, so checking number of fingers resets the color and checking color resets number of fingers. Then if you check number of fingers many times, you get the same result every time. But if you alternate checking fingers and color, you will get random results every time. Edit: Not that I'm saying this is what original poster meant, just that this is the main difference between quantum particles and our macroscopic objects like gloves.
      • trimethylpurine 3y ago
        Very good clarification.