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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
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A
null
field
has both electromagnetic invariants zero:
E
⋅
B
=
0
,
E
2
=
c
2
B
2
.
(1)
For
a
nonzero constant null
field
, the mixed
tensor
is
nilpotent
of index three,
F
μ
ρ
F
ρ
σ
F
σ
ν
=
0.
(2)
Ancestors
(8)
Electromagnetic field invariants
Electromagnetic field tensor
Electromagnetic four-potential
Relativistic electromagnetism
Electromagnetism
Branch of physics
Physics
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(2)
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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