About Philipp Lenard
Philipp Eduard Anton von Lenard was a Hungarian–German experimental physicist who received the Nobel Prize in Physics in 1905 for his work on cathode rays. This work led to his experimental realization of the photoelectric effect, discovering that the energy (speed) of the electrons ejected from a cathode depends only on the frequency and not the intensity of light. Lenard observed that the absorption of cathode rays was, to first order, proportional to the density of the material they were made to pass through. The photoelectric quantum theory was the work cited when Einstein was awarded the Nobel Prize in Physics in 1921. Lenard attended the Pozsonyi Királyi Katolikus Főgymnasium (now Gamča), and as he records in his autobiography, this made a big impression on him (especially the personality of his teacher, Virgil Klatt). In 1892, Lenard became a Privatdozent and an assistant to Heinrich Hertz at the University of Bonn; Lenard and Hertz conducted experiments with cathode rays, which led to him winning the 1905 Nobel Prize in Physics.
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