Engineer Pál Selényi (17 November 1884 – 21 March 1954)
[
"Fizikai Szemle 1999/5 - Zsolt Bor: OPTICS BY HUNGARIANS" (with Pál Selényi),
József Attila University, ]Szeged
Szeged ( , ; see also #Etymology, other alternative names) is List of cities and towns of Hungary#Largest cities in Hungary, the third largest city of Hungary, the largest city and regional centre of the Southern Great Plain and the county seat ...
, Hungary
Hungary is a landlocked country in Central Europe. Spanning much of the Pannonian Basin, Carpathian Basin, it is bordered by Slovakia to the north, Ukraine to the northeast, Romania to the east and southeast, Serbia to the south, Croatia and ...
, 1999, webpage:
KFKI-Hungary-Bor
was known as the "father of
xerography
Xerography is a dry photocopying technique. Originally called electrophotography, it was renamed xerography—from the Greek roots , meaning "dry" and , meaning "writing"—to emphasize that unlike reproduction techniques then in use such as c ...
" at
Tungsram corporation.
["GE Lighting 2" (including Pál Selényi),
Rövid Történet, GE Lighting Tungsram, 1996, webpage:
]
Tungsram-History
.
He is also known as Paul Selenyi.
Chester Carlson
Chester Floyd Carlson (February 8, 1906 – September 19, 1968) was an American physicist, inventor, and patent attorney born in Seattle, Washington.
Carlson invented electrophotography (now xerography, meaning "dry writing"), producing a dry ...
read one of Selenyi's papers in the 1930s and was very greatly impressed; subsequently, he invested in a big effort to develop
xerography
Xerography is a dry photocopying technique. Originally called electrophotography, it was renamed xerography—from the Greek roots , meaning "dry" and , meaning "writing"—to emphasize that unlike reproduction techniques then in use such as c ...
. That may be the reason why Selenyi was known as the "father of
xerography
Xerography is a dry photocopying technique. Originally called electrophotography, it was renamed xerography—from the Greek roots , meaning "dry" and , meaning "writing"—to emphasize that unlike reproduction techniques then in use such as c ...
" by some people.
Pál Selényi studied physics and mathematics at the
Budapest University.
[
After finishing his studies, Selényi started to work for the newly created Applied Physics Department of the University.
From his early works, Selényi was engaged in studying the nature of light.][ One well-known result of this period is Selényi's wide-angle interference experiment whose foundations go back to the discovery of the photoeffect ( photo-electric effect), by ]Albert Einstein
Albert Einstein (14 March 187918 April 1955) was a German-born theoretical physicist who is best known for developing the theory of relativity. Einstein also made important contributions to quantum mechanics. His mass–energy equivalence f ...
, and Hertz's experiments on the reflection of radio waves.[
Einstein's hypothesis was: elementary light sources emit electromagnetic waves along small solid angles, which had been supported by the fact that interference is simplest to achieve with lightwaves intersecting one another under small angles.][ The Young experiment is an example: light passing through a pair of neighboring holes (in close proximity) results in the appearance of interference patterns on a screen behind the holes, but only if the angle covered by the incoming beams does not exceed a couple of degrees of angular width.][
]
Notes
References
* "OPTICS BY HUNGARIANS" (including Pál Selényi), Zsolt Bor, Dept. of Optics and Quantum Electronics, József Attila University, Szeged
Szeged ( , ; see also #Etymology, other alternative names) is List of cities and towns of Hungary#Largest cities in Hungary, the third largest city of Hungary, the largest city and regional centre of the Southern Great Plain and the county seat ...
, Hungary
Hungary is a landlocked country in Central Europe. Spanning much of the Pannonian Basin, Carpathian Basin, it is bordered by Slovakia to the north, Ukraine to the northeast, Romania to the east and southeast, Serbia to the south, Croatia and ...
, May 1999, webpage
KFKI-Hungary-Bor
External links
(including Pál Selényi), Zsolt Bor, Dept. of Optics and Quantum Electronics, József Attila University, Szeged
Szeged ( , ; see also #Etymology, other alternative names) is List of cities and towns of Hungary#Largest cities in Hungary, the third largest city of Hungary, the largest city and regional centre of the Southern Great Plain and the county seat ...
, Hungary
Hungary is a landlocked country in Central Europe. Spanning much of the Pannonian Basin, Carpathian Basin, it is bordered by Slovakia to the north, Ukraine to the northeast, Romania to the east and southeast, Serbia to the south, Croatia and ...
, May 1999.
20th-century Hungarian inventors
20th-century Hungarian engineers
1884 births
1954 deaths
{{Hungary-engineer-stub