Given that the title suggests, spin was initially conceived given that the rotation of the particle about some axis. Even though the dilemma of no matter if elementary particles essentially rotate is ambiguous (as they are stage-like), this photo is proper insofar as spin obeys exactly the same mathematical rules http://bepfars.ir/post/8/%D8%A2%D9%85%D8%A7%D8%AF%D9%87-%D8%A7%D9%86%D8%AC%D8%A7%D9%85-%D8%AA%D8%AC%D8%B2%DB%8C%D9%87-%D9%88-%D8%AA%D8%AD%D9%84%DB%8C%D9%84-%D8%AE%D9%88%D8%AF%D8%AA%D8%A7%D9%86-%D9%87%D8%B3%D8%AA%DB%8C%D8%AF-.html