Den er proportional med den dimensionløse [[finstrukturkonstant]] uden andre afhængigheder.<ref>{{Cite journal |last=Parker|first=Richard H. |last2=Yu|first2=Chenghui |last3=Zhong|first3=Weicheng |last4=Estey|first4=Brian |last5=Müller|first5=Holger |date=2018-04-13 |title=Measurement of the fine-structure constant as a test of the Standard Model|journal=Science |language=en |volume=360 |issue=6385 |pages=191–195 |doi=10.1126/science.aap7706 |issn=0036-8075 |pmid=29650669|arxiv=1812.04130 }}</ref><ref>{{Cite journal |last=Davis|first=Richard S. |date=2017 |title=Determining the value of the fine-structure constant from a current balance: Getting acquainted with some upcoming changes to the SI |journal=American Journal of Physics |language=en |volume=85|issue=5|pages=364–368 |doi=10.1119/1.4976701|issn=0002-9505|arxiv=1610.02910}}</ref>
Fysik