Christian Andreas Doppler was a native of Salzburg and a genius in mathematics and physics. His discovery still wields a great influence on the world today: the Doppler Effect makes it possible for modern medicine to investigate processes in the human body, and with its aid, navigational and measuring systems all over the world have improved the safety of plane and car travel.

Even the theory of an expanding universe is based on Doppler’s discovery.

Speed measurement with radar is one of the many areas where the Doppler Effect has found a place in modern technology – whether it’s used to track down traffic offenders, in aviation, or to determine how fast you can throw the ball in the interactive exhibit …