Wave-particles

Properties of particles: spin. Let’s take an analogy to an everyday object, a ball. There is an axis of rotation; the ball is spinning around the axis. However, there are only two directions up or down when we measure the spin of a particle. 

An interesting thing is that the particle can be spinning in any direction before we measure it. Also, the particle doesn’t spin in a usual sense, like a ball, because the ball has parts, but a particle doesn’t. An ordinary object can spin in any direction, but quantum particle can only be found spinning in the direction of measurement.