Home › Forums › Hyperfine course › magnetic hyperfine interaction › in free atoms – task 1 › L and S This topic has 0 replies, 1 voice, and was last updated 6 months, 3 weeks ago by Himanshu. Viewing 1 post (of 1 total) Author Posts March 12, 2024 at 4:12 am #5455 HimanshuParticipant J=0 when L and S are anti parallel J=1 when L and S are perpendicular to one another since there is a partial contribution to the spin. J=2 when L and S are parallel in same direction, as both the spins would contribute. Author Posts Viewing 1 post (of 1 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In