The first television play. in the world. 'The Man With A Flower In His Mouth', by Pirandello. Produced by Lance Sieveking in July 1930. The purpose of the BBC Tuning Signal was to give the television set time to warm up, and for the viewer to adjust all of the controls in order to get a reasonable picture. The first televised Test match from The Oval in 1938. England v. Australia.
The equation of Angular velocity is: $\omega$ = $\frac{\theta}{t}$ radians/sec. 4. The linear velocity could be constant since the object could be travelling with constant speed without changing its direction. The angular velocity could not be constant since the body is constantly changing its direction.
The magnitude, or length, of the angular velocity vector is directly proportional to the angular speed, and is measured in the same units as angular speed (radians per second, degrees per second, revolutions per second, or revolutions per minute).