"goldmark" - 1 õppematerjal

Nimetu

over the world had been working on transmitting pictures or objects onto a screen since the 1830’s, but the first physical television didn’t evolve until the 1900’s.In 1862 Abbe Giovanna Caselli invents his Pantelegraph and becomes the first person to transmit a still image over wires. Then in 1906 Lee de Forest built a vacuum tube that worked in the first mechanical working television. In 1940 Peter Goldmark invents the first color television with 343 lines of revolution. From when the first television was made by Lee de Forest, there has been many changes and improvements to it. After the TV was first invented, in 1936, coaxial cable was invented to transmit television signals. The first TV started out with black and white pictures until 1940 when the first color TV was built. Later on in 1948 cable became available to people that owned televisions. This provided them with more channels to view.