Slovak Republic after 1993

200 Sk 2004 - Ján Andrej Segner (proof)

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Nominal

Gedenkmünze

Mint

Mint of Poland

Weight

18.00 g

Year

2004

Quality

proof

Metal

Diameter

34.00 mm

Author

M. Poldaufová

Product code

SRPS-044

200 Sk 2004 - Ján Andrej Segner (proof)

Jan Andrej Segner (4. 10. 1704 - 5. 10. 1777), a physician, physicist, teacher and inventor, and a native of Bratislava, was one of the most important scientists and engineers of the 18th century. He became known as the inventor of the co-called Segner Wheel, which was set into rotation by the reactive force of a stream of water flowing from bent pipes. The wheel was perfected by his contemporary, Leonard Euler. This invention led to the construction of water turbines, and, later on, rockets. Also remarkable are Segner's works dealing with the shapes of drops of water under the influence of forces in the air, a treatise on the convex and concave surfaces of liquids and forces coming into effect therein, as well as his discoveries in optics and astronomy. He was a successful teacher at the universities of Jena, Göttingen and Halle. His textbooks on mathematics and physics were among the most sought after and several editions were published.