Physics Nobel Prize awarded for insights into light
{{date|October  4, 2005}}

[[w:Roy J. Glauber|Roy J. Glauber]] ([[w:Harvard University|Harvard University]]) won half of this year's Physics [[w:Nobel Prize|Nobel Prize]], and
[[w:John L. Hall|John L. Hall]] ([[w:University of Colorado|University of Colorado]] and National Institute of Standards and Technology) and [[w:Theodor W. Hänsch|Theodor W. Hänsch]] ([[w:Max-Planck-Institut|Max-Planck-Institut]] für Quantenoptik, [[w:Garching bei München|Garching]]) each receive a quarter of the prize.

Glauber clarified the quantum nature of light. He showed how light composed of discrete quantum particles (photons) can be reconciled with the wave-like behavior of light. His theoretical work laid the foundations of [[w:quantum optics|quantum optics]].

Hall and Hänsch  developed methods to measure the frequency of light to extreme precisions. Their findings "have made it possible to measure frequencies with an accuracy of 15 digits," for use in highly accurate clocks and new technology for global positioning systems.

The recipients will share a 10,000,000 kronor prize (1.5 Million USD), with Glauber receiving half and Hall and Hänsch each receiving a quarter of the total.

== Sources ==
*{{source|url=http://nobelprize.org/index.html
|title=NobelPrize web page
|author=
|pub=
|date=October 4, 2005}}
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*{{source|url=http://www.abc.net.au/news/newsitems/200510/s1474673.htm
|title=
|author=
|pub=ABC Australia Online
|date=October 04, 2005}}

*{{source|url=http://link.aps.org/abstract/PR/v130/p2529
|title=The Quantum Theory of Optical Coherence
|author=Roy J. Glauber
|pub=Physical Review
|date=June 15, 1963}}

*{{source|url=http://link.aps.org/abstract/PRL/v85/p3797
|title=Accuracy Comparison of Absolute Optical Frequency Measurement between Harmonic-Generation Synthesis and a Frequency-Division Femtosecond Comb
|author=Jun Ye, Tai Hyun Yoon, and John L. Hall
|pub=Physical Review Letters
|date=October 30, 2000}}

*{{source|url=http://link.aps.org/abstract/PRL/v82/p3568
|title=Absolute Optical Frequency Measurement of the Cesium D1 Line with a Mode-Locked Laser
|author=Th. Udem, J. Reichert, R. Holzwarth, and T. W. Hänsch
|pub=Physical Review Letters
|date=May 3, 1999}}

{{Publish}}

{{archive-sighted}}
[[Category:physics]]
[[Category:Science and technology]]
[[Category:Sweden]]
[[Category:Europe]]
[[Category:Particle physics]]

[[es:Tres físicos ganan el Premio Nobel de Física por sus trabajos en óptica]]
[[fr:Le prix Nobel de physique 2005 pour des recherches sur la nature de la lumière]]
[[pt:Dois americanos e um alemão ganham Nobel de Física por estudos sobre a luz]]
Roy J. Glauber (Harvard University) won half of this year's Physics Nobel Prize, and
John L. Hall (University of Colorado and National Institute of Standards and Technology) and Theodor W. Hänsch (Max-Planck-Institut für Quantenoptik, Garching) each receive a quarter of the prize.

Glauber clarified the quantum nature of light. He showed how light composed of discrete quantum particles (photons) can be reconciled with the wave-like behavior of light. His theoretical work laid the foundations of quantum optics.

Hall and Hänsch  developed methods to measure the frequency of light to extreme precisions. Their findings "have made it possible to measure frequencies with an accuracy of 15 digits," for use in highly accurate clocks and new technology for global positioning systems.

The recipients will share a 10,000,000 kronor prize (1.5 Million USD), with Glauber receiving half and Hall and Hänsch each receiving a quarter of the total.

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es:Tres físicos ganan el Premio Nobel de Física por sus trabajos en óptica
fr:Le prix Nobel de physique 2005 pour des recherches sur la nature de la lumière
Dois americanos e um alemão ganham Nobel de Física por estudos sobre a luz
physics Science and technology Sweden Europe Particle physics