Milestones:Discovery of Radioconduction by Edouard Branly, 1890
Discovery of Radioconduction by Edouard Branly, 1890
In this building, Edouard Branly discovered radioconduction, now called the Branly Effect. On 24 November 1890, he observed that an electromagnetic wave changes the ability of metal filings to conduct electricity. Branly used his discovery to make a very sensitive detector called a coherer, improved versions of which became the first practical wireless signal receivers.