- #1
Mentz114
- 5,432
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I understand that the quantities
[tex]E^2 - B^2[/tex]
[tex]\vec{E} \cdot \vec{B}[/tex]
(the dot is vector inner product).
where E and B are the electric and magnetic components of an EM wave,
are invariant under Lorentz/Poincare transformations.
Can someone explain the physical significance of this ? Is either quantity related to the velocity of light ( or the invariance of the velocity of light ) ?
The second expression must be zero at all times surely ?
[tex]E^2 - B^2[/tex]
[tex]\vec{E} \cdot \vec{B}[/tex]
(the dot is vector inner product).
where E and B are the electric and magnetic components of an EM wave,
are invariant under Lorentz/Poincare transformations.
Can someone explain the physical significance of this ? Is either quantity related to the velocity of light ( or the invariance of the velocity of light ) ?
The second expression must be zero at all times surely ?
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