Geek Fact for June 19th
In 1931, the first photoelectric cell commercial installation occurred. The swinging doors between the kitchen and dining room of Wilcox’s Pier Restaurant in West Haven, Connecticut were operated by a photoelectric cell. Learn more at http://www.explainthatstuff.com/how-photoelectric-cells-work.html In 1963, Russian cosmonaut Valentina Tereshkova, the first woman […]
Geek Fact for June 19th Read More »