Exhibitions

Atomic Clock (Hydrogen Maser)

August 25, 1980 – November 15, 1981

National Museum of American History
1300 Constitution Ave., NW
Washington, DC

1st Floor, Entrance to "Atom Smashers"

See on Map Floor Plan

Observe the original Hydrogen Maser, the most stable and precise of atomic clocks, invented by Norman F. Ramsey of Harvard University.