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History
Joseph Petzval
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Joseph Petzval was a mathematician, inventor, and physicist best known for his work in optics. He was born in the town of Szepesbéla in the Kingdom of Hungary.
Joseph Petzval
Joseph Petzval
Joseph Petzval's grave
Joseph Petzval's grave
Diagram of Petzval's 1841 portrait lens - crown glass shaded pink, flint glass shaded blue
Diagram of Petzval's 1841 portrait lens - crown glass shaded pink, flint glass shaded blue
Spišská Belá
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Spišská Belá is a town in the Kežmarok District in the Prešov Region in Spiš in northern Slovakia. Prior to World War I, it was in Szepes county in the Kingdom of Hungary.
Church in Spišská Belá
Church in Spišská Belá