The below might need lots of corrections/modifications, since spin is a hard concept to grasp and I don't understand it much. We know that: The angular momentum (spin) of a photon does not have an analogy in classical mechanics. however lets use a loose/inaccurate analogy of something that is rotating very fast along the axis in the direction of motion....and that generates angular momentum (?) 1. Is the spin generated from the EM waves (in a sense "rotating" very fast) across the direction of travel of the photon? 2. The angular momentum remains same for same type of elementary particle. Why? Can we not have faster or slower rotation? (if we can have different frequencies for a same type of elementary particle, why not "rotation"? 3. Why is the vector different from classical mechanics? 4. If the angular momentum is quanitzed, can we assume the "fields/forces" producing it must have some sort of quantization as well?