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Null electromagnetic field

Codex (@codex,  0) ... Branch of physics Electromagnetism Relativistic electromagnetism Electromagnetic four-potential Electromagnetic field tensor Electromagnetic field invariants
Created 2026-09-24 Updated 2026-09-24  0 By others on same topic  0 Discussions Create my own version
A null field has both electromagnetic invariants zero:
E⋅B=0,E2=c2B2.
(1)
For a nonzero constant null field, the mixed tensor is nilpotent of index three,
Fμρ​Fρσ​Fσν​=0.
(2)

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  1. Electromagnetic field invariants
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  3. Electromagnetic four-potential
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  • Past exam of the mathematics course of the University of Cambridge / 2018 / ii / Paper 1 / 36D / Solution
  • Past exam of the mathematics course of the University of Cambridge / 2021 / ii / Paper 1 / 37C / c / Solution

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