Asked in Royal Air Force
What new technology did the Royal Air Force use to stop German airplanes?
The most usual answer would probably be Radar. However, the Germans also had radar at the same time as the British, but used it differently. Although radar gave the RAF advanced warning of approaching enemy aircraft, the way the information was used to vector fighter squadrons to their targets was probably the main reason the RAF held the Luftwaffe at bay during the batle of Britain.