In association football, goal-line technology is the use of electronic aid to determine if a goal has been scored or not. In detail, it is a method used to determine when the ball has completely crossed the goal line in between the goal-posts and underneath the crossbar with the assistance of electronic devices and at the same time assisting the referee in awarding a goal or not. The objective of goal-line technology (GLT) is not to replace the role of the officials, but rather to support them in their decision-making. The GLT must provide a clear indication as to whether the ball has fully crossed the line, and this information will serve to assist the referee in making their final decision.
The Adidas Teamgeist II with implanted chip, part of the proposed Cairos-Adidas system for goal-line technology
Edin Džeko of Manchester City scored the first goal in the Premier League that was given by goal-line technology
Association football, commonly known as football, or soccer, is a team sport played between two teams of 11 players each, who primarily use their feet to propel a ball around a rectangular field called a pitch. The objective of the game is to score more goals than the opposing team by moving the ball beyond the goal line into a rectangular-framed goal defended by the opposing team. Traditionally, the game has been played over two 45-minute halves, for a total match time of 90 minutes. With an estimated 250 million players active in over 200 countries and territories, it is the world's most popular sport.
The attacking player (No. 10) attempts to kick the ball into the net behind the opposing team's goalkeeper (here wearing red and yellow) to score a goal.
An early draft of the original hand-written 'Laws of the Game' drawn up on behalf of The Football Association by Ebenezer Cobb Morley in 1863 on display at the National Football Museum, Manchester, England
The Aston Villa team in 1897, after winning both the FA Cup and the English Football League
The Zamalek team in 1921, after winning the Sultan Hussein Cup, the first title in Egyptian football history, 1921