Happy 86th birthday to physicist John Hall - join us in congratulating him!
According to quantum physics, light and other electromagnetic radiation appear in the form of quanta, packets with fixed energies, which also correspond to energy transitions in atoms. Consequently, determining the frequency of light waves provides information about the atoms' properties, benchmarks for time and length, and the possibility of determining physical constants.
Around the year 2000, John Hall and Theodor Hänsch developed the frequency comb technique, in which laser light with a series of equidistant frequencies is used to measure frequencies with great precision.
They were awarded the 2005 Nobel Prize in Physics for "their contributions to the development of laser-based precision spectroscopy, including the optical frequency comb technique."
Learn more: https://www.nobelprize.org/prizes/physics/2005/hall/biographical/
John Lewis "Jan" Hall is an American physicist, and Nobel laureate in physics. He shared the 2005 Nobel Prize in Physics with Theodor W. Hänsch and Roy Glauber for his work in precision spectroscopy.
Born: 21 August 1934 (age 86 years), Denver, Colorado, United States
Field: Physics
Books: Online bibliographic databases, Cell membranes and ion transport, more
Education: College of Engineering, Carnegie Mellon University, South High School, more
Notable student: Jun Ye
Awards: Frederic Ives Medal, Arthur L. Schawlow Prize in Laser Science, more
Grateful thanks to Nobel Prize, Wikipedia Google and Facebook .
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