Lecture: The importance and principles of the international system of units

The establishment of the international system of units “SI” facilitates many areas of our lives almost unnoticed. The lecture provides an insight from the first ideas that led to the introduction of weights and measures of length to the “birth” of the SI system of units. In addition, the example of mass is used to explain why, since the “little revolution” on May 20, 2019, the SI system of units has been based on fundamental constants such as the Planck constant and why almost all quantities are based on quantum standards.

Speaker: Dr.-Ing. Prof. h. c. Frank Härtig, Vice President Physikalisch-Technische Bundesanstalt

Lecture language: English