Physical Dimensions/Units and Universal Constants: Their Invariance in Special and General Relativity

  title={Physical Dimensions/Units and Universal Constants: Their Invariance in Special and General Relativity},
  author={Friedrich W. Hehl and Claus L{\"a}mmerzahl},
  journal={Annalen der Physik},
The theory of physical dimensions and units in physics is outlined. This includes a discussion of the universal applicability and superiority of quantity equations. The International System of Units (SI) is one example thereof. By analyzing mechanics and electrodynamics, it naturally leads one, besides the dimensions of length and time, to the fundamental units of action h , electric charge q, and magnetic flux ϕ. Also, q×ϕ=action and q/ϕ=1/resistance are known. These results of classical… 
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