John Lewis "Jan" Hall (born August 21, 1934) is an American physicist, an Nobel laureate in physics. He shared ane fowert o the 2005 Nobel Prize in Physics wi Theodor W. Hänsch an Roy Glauber for his wirk in preceesion spectroscopy.

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John Lewis Hall
John L. Hall in Lindau.jpg
Born (1934-08-21) 21 August 1934 (age 86)
Denver, Colorado, U.S.
NaitionalityUnitit States
Alma materCarnegie Institute of Technology
Kent forOptical frequency comb
AwairdsDepairtment o Commerce Gold Medal (1969)
Nobel Prize in Physics (2005)
Scientific career
FieldsPhysics
InstitutionsVarsity o Colorado Boulder, JILA, NIST
Doctoral studentsJun Ye
Leo Hollberg
Marc Rayman