Which electromagnetic equations apply in rotating coordinates? |
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Authors: | David L Webster Robert C Whitten |
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Institution: | (1) Space Science Division, NASA, Ames Research Center, Moffett Field, Calif., U.S.A. |
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Abstract: | It was discovered some years ago by Schiff that the equations divE = 4πQ and curlB - (1/c) ∂E/∂t = (4π/c)J for fields in vacuum do not carry over without change from an inertial frame to a frame with rotating axes of space coordinates,
even for a region with all velocities of orderv≪c. However, the belief that all four of the field equations are invariant under such conditions is still prevalent and causes
misconceptions in physical applications, including astrophysical and geophysical ones. The purpose of the present paper is
therefore to call attention to Schiff's discovery, discussing its basis and its extension to fields in material media, and
to interpret the additional terms that must be added to the equations in order to obtain valid transformations to rotating
axes of coordinates. |
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