What was the first scene on television ?

the world's first public demonstration of a working television system that transmitted moving images with tone graduation (grayscale) on

Completely electronic television systems relied on the inventions of Philo Taylor Farnsworth, Vladimir Zworykin and others to produce a system suitable for mass distribution of television programming. Farnsworth gave the world's first public demonstration of an all-electronic television system at the Franklin Institute in Philadelphia on 25 August 1934.

http://en.wikipedia.org/wiki/Television