Past colloquia and seminars


CANCELLED : The unit of mass in the new SI

General public Colloquium / Congress / Forum


On May 20, 2019, metrology underwent an unprecedented revolution. Four of the seven base units have been redefined so that today the entire system is based on fixed values of fundamental constants. In particular, the unit of mass, the kilogram, is now related to Planck's constant.
After a brief introduction and the presentation of the new International System of units (SI), we will focus on the new realizations of the kilogram, in particular the watt balance also called Kibble balance. The design and operation of the Metas experiment will be explained and its latest results will serve as a conclusion.

When? 28.10.2020 16:50 - 
Where? PER 08 0.51
Chemin du Musée 3
1700 Fribourg
speaker Dr. Ali Eichenberger
Bundesamt für Metrologie METAS, Bern
Contact Département de physique
Claude Monney