Join William D. Phillips, Distinguished University and College Park Professor of Physics, University of Maryland NIST Fellow, National Institute of Standards and Technology for a Charles M. and Martha Hitchcock Lecture on the topic of A New Measure: The Revolutionary, Quantum Reform of the Modern Metric System.

The International System of Units (the SI), the modern metric system, has recently undergone its most revolutionary change since its origins during the French Revolution. This talk will describe why this reform was needed and how it is done.