The 4f shells each can have two spin states, up or down.

Back to our example, the spin state of the particle is spin-1.

On the other hand, arbitrary motion among spin states may be unreasonable.

Furthermore, since photons have two spin states, the value of f is 2.

At this point the unpaired electrons can move between their two spin states.

But according to the Copenhagenians, the particles have no spin state at all until observed.

And withut that field, the spin states are pretty much degenerate.

There are 4 possible spin states for this system:

In this sense the transverse spin state of the photon does not exist.

During a charge, the iron atom in the center of the octahedron has a high spin state.