Abstract
PROF. CRAMP has proposed1 that the dimensional expressions for the electrostatic and electromagnetic units may be simplified by regarding quantity of electricity Q as fundamental. To my reply2, that including Q would cause confusion because, whereas M, L and T are quantities which vary with the velocity of the observer, Q is invariant, Prof. Cramp's2 rejoinder is the question: How it is known that Q is invariant? The invariance of the charge carried by a moving particle is, I believe, generally accepted. A simple proof of the consistency of this invariance with the special principle of relativity is given in N. R. Campbell's “Modern Electrical Theory”, p. 361.
Similar content being viewed by others
Article PDF
References
NATURE, 130, 368, Sept. 3, 1932.
NATURE, 130, 892, Dec. 10, 1932.
NATURE, 131, 59, Jan. 14, 1933.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
DENTON, F. Dimensions of Fundamental Units. Nature 131, 585 (1933). https://doi.org/10.1038/131585a0
Issue Date:
DOI: https://doi.org/10.1038/131585a0
Comments
By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.