How does a magnetic field differ from a gravitational field?
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The biggest difference is that a gravitational field is mathematically classified as a tensor field while magnetic fields, or actually electromagnetic fields, are vector fields. This means that it takes 4×4=16 components to define a gravitational field in general while it only takes 4 components to define an electromagnetic field. The number 4 comes up … Continue reading How does a magnetic field differ from a gravitational field? →