What is Goal Line Technology?

What is Goal Line Technology?

What exactly is goal line technology? Does it work? Implementing it will improve the game and lay to rest all those controversial game scoring moments...
What exactly is goal line technology? Does it work? Implementing it will improve the game and lay to rest all those controversial game scoring moments and referee decisions, right? Soccer fans, according to several blogs and article comments, seem to confuse goal line technology with 'instant replay' technology used in sports like American football or basketball. Soccer's goal line technology is not even close to instant replay. Goal line technology uses radio waves between a transmitter inside specially designed soccer balls and other strategically placed units, such as upon goal posts. The radio signals indicate when the ball has crossed...