How was the first television made?
The television systems being experimented with at that time consisted of a system of spinning disks with holes punched in them and mirrors designed to convert light to electricity. These disks and mirrors could give only poor resolution. Farnsworth called his device an image dissector because it converted individual elements of the image into electricity one at a time. He replaced the spinning disks with cesium, an element that emits electrons when exposed to light. Farnsworth applied for a patent for his image dissector in 1927. The development of the television system was plagued by lack of money and by challenges to Farnsworth's patent from the giant Radio Corporation of America (RCA). He spent his career as head of the Farnsworth Television and Radio Corporation, which he founded in 1929.
Farnsworth= Philo Farnsworth