obituaries: Norman Foster Ramsey Jr

Kleppner presents an obituary for physicist Norman Foster Ramsey Jr who died on Nov 4, 2011. Ramsey is best known for inventing the separated oscillatory field method and the hydrogen maser, for which he received the Nobel Prize in 1989, but those were just two of his many contributions. He helped to found Brookhaven National Laboratory and was instrumental in the creation of Fermilab. During his four- decade career at Harvard University he supervised 84 PhD students and continued to teach at Harvard and elsewhere long after his retirement in 1986.