Baird's electromechanical television system

Baird's electromechanical television system used a spinning disc with tiny holes (a Nipkow disk) to scan an image and convert it into a sequence of electrical signals. At the receiver, a similar disk synchronized with the sender recreated the image by directing a bright light through a similar pattern, which was then captured by a moving photoelectric cell and displayed on a screen. This method translated visual images into electrical signals and back, pioneering early TV technology. While limited in detail and resolution, it demonstrated the fundamental concept of transmitting visual information electrically.