In this lecture, Nobel Prize winner Prof. Dr. William D. Phillips explores the most radical transformation of the International System of Units (SI) since its origins in the French Revolution. Instead of relying on physical artefacts, all base units are now defined by fixed values of natural constants. The talk explains why this reform was necessary and how it works.

There will be an apéro after the lecture.

This event is organised by the VBG in partnership with the Department of Physics.