Question

A particle is located in a 3D potential box. The box is physically cut in the middle and sent half of it to the moon. The remaining half box was stayed on the earth and then the box on earth is opened. What happens in the box on the moon which explanation gives the Copenhagen interpretation to this thought experiment. Is there any other interpretation for this case?

Answer 1

if this particle is thought of a classical particle , if the particle is found in the box in the earth then we automatically know that there is no particle in the box on the moon, after we opened the box in the earth we could say that all along this time when it was not opened the particle was in the box in earth and not in the moon.

but when it comes to quantum scale, according to copenhagen's interpretation, the particle is in the box as well as not in the box with the same amount of probability of both states, now if you open the box in the earth and collapse the wavefunction of the particle, and let us assume that the particle is in the box in the earth, but still we cannot conclude that before openeing the box there was particle in the box in the earth, before opening the box the particle was in both boxes, but after opening it collapsed into one of the states.

this question requires much more information to explain quantitatively, qualitatively one could conclude as given above.