Persistence of vision is the phenomenon of the eye by which an afterimage is thought to persist for approximately one twenty-fifth of a second on the retina.
|(Image: This animated cartoon of a galloping horse is displayed at 12 drawings per second )|
|(Image: How 3 Colour Electron Gun Works)|
In order to create 50 frame per second, the electron beam should move in a very high speed and it will make the circuitry very complex.
|(Image: Interlaced Scanning in the TV)|
Thus the TV signal received in the TV contains a luminescence signal and a chrominescence signal.