Physicists detect exotic looped trajectories of light in three-slit experiment
January 6, 2017
boydwlaser

Physicists have performed a variation of the famous 200-year-old double-slit experiment that, for the first time, involves “exotic looped trajectories” of photons. These photons travel forward through one slit, then loop around and travel back through another slit, and then sometimes loop around again and travel forward through a third slit. (link)