emilos1102 emilos1102 15-01-2020 Physics contestada If a proton emits a photon in a spin-flipping event in a magnetic field, which is true? A. It flips from spin up to spin down. B. It flips from spin down to the spin perpendicular to the magnetic field. C. It flips from spin down to spin up. D. It flips from spin up to the spin perpendicular to the magnetic field.