A7.1 - What did the current SI do to the uncertainties in measurement of defining constants?
- Event
- SMSI 2023
2023-05-08 - 2023-05-11
Nürnberg - Band
- Lectures
- Chapter
- A7 - Quantum Standards
- Author(s)
- R. Kacker - National Institute of Standards and Technology, Gaithersburg (USA)
- Pages
- 77 - 78
- DOI
- 10.5162/SMSI2023/A7.1
- ISBN
- 978-3-9819376-8-8
- Price
- free
Abstract
We present a brief axiomatic description of the current SI. A set of seven defining fundamental constants were assigned an exact value in the SI based on their best-known quantity values in terms of the previous SI units. The defining constants so established redefine the SI base and other units. The previous uncertainties in measurement of the defining constants did not evaporate. They were shifted to the physical realizations of the SI units of related quantities.