Question

How does goal line technology work?

Answer 1

Answer:

When the circuit in the ball crosses the goal line, the electromagnetic field changes, and the computer automatically notifies the referee, again by a radio signal transmitted to his or her watch.

(or)

 A computer tracks the position of the ball via the sensor and detects when the ball crosses the goalline. Another camera-based system, Goalminder uses high-speed cameras built into the goal posts and crossbar to deliver visual evidence only to the referee, leaving it to the judgement of the officials.

Answer 2

Answer:

Ok I am sending the pictures wait ok