Television means being able to view moving images at distance and video allows us to record and replay picture and sound. Both are part of daily life.
TV was invented over 70 years ago but its progress from the first black and white images to colour took little more than 25 years.
The basic principle of television is a little like that of film and works because of the way we see. When we look at a series of still images send rapidly and sequentially, the trace of each one lingers at the back of ...
Television got off to a slow start. This was a new and expensive form of entertainment and the technology was far from assured.
Even before World War Two intervened ...