From what I've read, photons have spin of 1 (I guess possible by their relativistic mass), and when a photon is emitted from an atom, the production of this spin affects the balance of the atom's quantized system.
My question here is am I right in guessing about momentum being caused by relativistic mass, and what is the reasoning behind the conservation of momentum in the atom's system, because from what I've read there are different spins (with different sets of finite states) for different particles -- so what is the algebra used for angular momentum, and how does this algebra relate to reality (e.g. we talk of specific orbitals with specific dimensions in a simple model of the atom, but we know that orbitals can be distorted in some cases)?
