Nobel Prizes and Laureates

Nobel Prizes and Laureates

The Nobel Prize in Physics 1905
Philipp Lenard

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Philipp Lenard - Facts

Philipp Eduard Anton von Lenard

Philipp Eduard Anton von Lenard

Born: 7 June 1862, Pressburg (now Bratislava), Hungary (now Slovakia)

Died: 20 May 1947, Messelhausen, Germany

Affiliation at the time of the award: Kiel University, Kiel, Germany

Prize motivation: "for his work on cathode rays"

Field: atomic physics

Prize share: 1/1

Discovered that Cathode Rays Could Exist outside the Discharge Tube

Experiments at the end of the 19th century with cathode rays, radiation emitted in a low pressure glass tube when a voltage is applied between two metal plates, led to the discoveries of the electron and of X-rays. In crucial experiments by Philipp Lenard, started in 1893, the glass tube was equipped with a thin aluminium window making it possible to study the radiation outside the glass tube. One could show that the radiation was not electromagnetic.

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