Video Title: (Interview With John Hall On Laser Measurement)
Video Duration: 6:21
From: SPIETV
Category: Science and Technology
the winner of the 2005 nobel prize in physics reflects on a career spent with a fascination for lasers and science. john l. hall is a fellow and senior research ociate at jila, a joint insute of the university of colorado at boulder and the national insute of standards and technology. he was awarded the 2005 nobel prize in physics. hall is known as a pre-eminent laser experimentalist, concentrating on improving the precision and accuracy with which lasers can produce a specific, sharp frequency or color of light, and the stability to hold that frequency. his work has been essential to precision spectroscopy for physical and chemical annaysis, new tests and measurements of fundamental physical laws and constants, time and length, metrology and fiber-optic communications. in the 1960s he worked on the development of the methane-stabilized helium-neon laser, which became the cornerstone of a famous experiment at nist to measure the speed of light at least 100 times better than any previous determination. the work ultimately led to a fundamental redefinition of the meter, the basic unit of distance measurement. hall shared the nobel with theodor hänsch of the max planck insute for quantum optics and a professor of physics at ludwig maximilians university in munich, germany, and roy j. glauber, a professor of physics at harvard university. hall and hänsch were awarded half the nobel prize for their contributions to the development of laser-based precision ltbgt...lt bgt
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