HEP Phenomenology2026-03-071 minarXiv:2603.07010expressA Photon in a Magnetic Field: How Light Acquires a Magnetic MomentLight is a stream of photons, and ordinarily a photon has no magnetic moment: it doesn't deflect in a magnetic field like iron filings.Sree Ram Valluri·Farrukh Chishtie·Wieslaw J. MielniczukCompton effectZeeman effectArthur ComptonHendrik LorentzIsidor Isaac Rabimagnetic fieldphotonsynchrotron radiationAharonov–Bohm effectdark photon👍👎☆SimplePopularAdvanced