- The Balinese plate trick and similar tricks demonstrate this practically.
- Although I must say that I never found the plate trick to be an especially convincing illustration.
- What helps make the device possible is the peculiar connectivity of the space of 3D rotations, as discovered by P . A . M . Dirac and illustrated in his string trick ( also known as the plate trick ).
- To return the particle to its exact original state, one needs a 720-degree rotation . ( The Plate trick and Mobius strip give non-quantum analogies . ) A spin-zero particle can only have a single quantum state, even after torque is applied.