[PDF] Determining the value of the fine-structure constant from a current balance: Getting acquainted with some upcoming changes to the SI | Semantic Scholar

Determining the value of the fine-structure constant from a current balance: Getting acquainted with some upcoming changes to the SI

@article{Davis2016DeterminingTV,
title={Determining the value of the fine-structure constant from a current balance: Getting acquainted with some upcoming changes to the SI},
author={R. Davis},
journal={American Journal of Physics},
year={2016},
volume={85},
pages={364-368}
}

The revised International System of Units (SI), expected to be approved late in 2018, has implications for physics pedagogy. The ampere definition, which dates from 1948, will be replaced by a definition that fixes the numerical value of the elementary charge e in coulombs. The kilogram definition, which dates from 1889, will be replaced by a definition that fixes the numerical value of the Planck constant h in joule seconds. Existing SI equations will be completely unaffected. However, there… CONTINUE READING