Philipp Eduard Anton von Lenard
The Nobel Prize in Physics 1905
Born: 7 June 1862, Pressburg (now Bratislava), Hungary (now Slovakia)
Died: 20 May 1947, Messelhausen, Germany (now Alsace (then Germany, now France))
Affiliation at the time of the award: Kiel University, Kiel, Germany
Prize motivation: "for his work on cathode rays."
Prize share: 1/1
Experiments conducted in the late 19th century on cathode rays (radiation emitted when a voltage is applied between two metal plates in a glass tube filled with low-pressure gas) led to the discovery of electrons and X-rays. In crucial experiments performed by Philipp Lenard beginning in 1893, the glass tube was fitted with a thin aluminum window, making it possible to study the radiation outside the tube and thereby prove that it was not electromagnetic in nature.
Their work and discoveries range from the Earth’s climate and our sense of touch to efforts to safeguard freedom of expression.
See them all presented here.