Can anybody provide me with a link to a REAL life experiment (a credible source, and not a thought experiment. ) when a moving observer relative to an electric charge can see a magnetic field? I'm thinking to a sensor that is spinning around an electrically charged sphere or disc...if in REAL life will see or not an magnetic field? I'm asking because i learned of an similar experiment where the Hall effect sensor did not measured any magnetic field while spinning around a stationary charged disc, but the website wasn't too convincing... Thanks!