This is a screenshot of the Noble Prize organization website on the biography of the Noble laureate Johannes Stark. And this is what I found worthy to ask about his work. In the last lines of his biography it mentions something about his research on the deflection of light due to strong unhomogeneousinhomogeneous electric fields. I found this years ago, I searched throughout the internet, but I couldn't find anything about it, not even in the fringe science or obsolete theories topics. I wonder if you know something about light deflection by strong unhomogeneousinhomogeneous electric or magnetic fields, and if you do, could you please provide some bibliographical references?
https://www.nobelprize.org/prizes/physics/1919/stark/biographical/