To be fair to Mallet he was constructing a model of the universe...His Ring Laser (Electromagnetic) represented the universe in which Einstein postulated that everything returns to its point of origin, like when he said if he stood on a hill and shot an arrow into the universe it would at some point come back and hit him in the backNope. Light doesn't travel in circles. And no one has ever verified that light has mass. It's all just make believe.
Maybe he had a very long armI vaguely recall watching a documentary & our science teacher telling us also, that there was a time hole made in around 1880s - 1920s, were someone put their hand at one end of the room through the time hole & it ended up at the other end of the room were the second hole was stationed. anyone know of that one?