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Open AccessFeature PaperEditor’s ChoiceReview

Measuring Electromagnetic Fields in Rotating Frames of Reference

1
School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK
2
Laboratori Nazionale di Legnaro, INFN, Vialle dell’Universita 2, 3520 Legnaro, Padova, Italy
*
Author to whom correspondence should be addressed.
Universe 2020, 6(2), 31; https://doi.org/10.3390/universe6020031
Received: 19 December 2019 / Revised: 8 February 2020 / Accepted: 9 February 2020 / Published: 11 February 2020
(This article belongs to the Special Issue Rotation Effects in Relativity)
We review the problem of transforming electromagnetic fields between inertial and rotating reference frames. We compare the method of straightforward tensor coordinate transformations adopted by Schiff in his well-known paper of 1939 with the method of Orthogonal Tetrads (OT) that was applied to this problem in 1964 by Irvine. Although both methods are mathematically rigorous, the transformed fields have different forms depending on the method adopted. We emphasize that the OT method is expected to predict the fields that would actually be measured by an observer in a rotating frame of reference. We briefly discuss existing experimental evidence that supports the OT approach, but point out that there appears to be little awareness in the physics community of this problem or its resolution. We use both methods to transform the electrostatic and magnetic fields generated by rotating charged spherical shells from an inertial into a co-rotating system. We also briefly describe how such an arrangement of shells could be used to measure rotation relative to the fixed stars. View Full-Text
Keywords: special relativity; electromagnetism; rotating frame special relativity; electromagnetism; rotating frame
MDPI and ACS Style

Speake, C.C.; Ortolan, A. Measuring Electromagnetic Fields in Rotating Frames of Reference. Universe 2020, 6, 31. https://doi.org/10.3390/universe6020031

AMA Style

Speake CC, Ortolan A. Measuring Electromagnetic Fields in Rotating Frames of Reference. Universe. 2020; 6(2):31. https://doi.org/10.3390/universe6020031

Chicago/Turabian Style

Speake, Clive C.; Ortolan, Antonello. 2020. "Measuring Electromagnetic Fields in Rotating Frames of Reference" Universe 6, no. 2: 31. https://doi.org/10.3390/universe6020031

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