Physics: 2005 Nobel Prize in Physics

Electromagnetism Optics Quantum Mechanics
2005 Nobel Prize in Physics Awarded to: Roy J. Glauber, John L. Hall, Theodor W. Hänsch His contribution to the quantum theory of optical coherence / for their contributions to the development of laser-based precision spectroscopy, including the optical frequency comb technique.

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Commentary

Source: Wikipedia
In 2005, the Nobel Prize in Physics went to Roy J. Glauber, Jo hn L. Hall, Theodor W. Hänsch. The prize was awarded for: His contribution to the quantum theory of optical coherence / for their contributions to the development of laser-based precision spectroscopy, including the optical frequency comb technique.

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Source: Internal
Why does development of laser-based precision spectroscopy matter? The work honored in 2005 helped fill in a piece of the puzzle of how the physical world operates. Every Nobel Prize in Physics marks a shift — a moment when our understanding deepened and, often, something practical followed.

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Source: Wikipedia
Historical note: 2005 Roy J. Glauber, John L. Hall, Theodor W. Hänsch (various countries) receiv ed the Nobel Prize in Physics in 2005. Official Nobel citation: "for his contribution to the quantum theory of optical coherence / for their contributions to the development of laser-based precision spectroscopy, including the optical frequency comb technique" The Nobel Prize in Physics has been awarded since 1901. Each prize reflects the scientific priorities and discoveries of its era.