In 1925 he sent the first television image of a ventriloquists dummy across a room. This clip is from the series The Genius of Invention. This clip will be relevant for teaching Physics and History.

(WSFA) - “The Farnsworth Invention” is a fictionalized account ... Philo Farnsworth is on his way to inventing the world’s first television. But media mogul and visionary David Sarnoff ...

Closed-circuit television, invented during World War II for military use, was not widespread in the 1960s, and the Browns proposed using the technology to create the first modern home security system.