caption work_institution birth_place nationality field birth_date known_for prizes image article_title name alma_mater
hall at the 2012 lindau nobel laureate meeting university of colorado boulder , jila , nist denver , colorado , u.s. united states physics 21 august 1934 optical frequency comb department prize in physics -lrb- 2005 -rrb- of commerce gold medal -lrb- 1969 -rrb- nobel john l. hall in lindau.jpg john l. hall
 john lewis hall carnegie institute of technology
john l. hall

john lewis `` jan '' hall -lrb- born august 21 , 1934 -rrb- is an american physicist , and nobel laureate in physics .
he shared one fourth of the 2005 nobel prize in physics with theodor w. hänsch and roy glauber for his work in precision spectroscopy .
