A closer look
If you wanted to watch a boxing match on a massive cinema screen in the 1950s, you were relying on a machine that sounded like a supervillain weapon. The Eidophor projector shot a high-powered electron beam into a slowly rotating mirror coated in specialized oil. By warping the oil with electricity and blasting light through it, they projected live TV. It proved that engineers will literally electrify boiling grease for a decent sports broadcast.






