21. The vector potential changes the phase of the quanta produced by the field when they move from point to point. 22. Where is the particle's electric charge, is the vector potential , and is the speed of light. 23. Where \ mathbf { \ Phi } is a harmonic vector potential and \ chi is a harmonic scalar potential. 24. Moreover, the TM field can be derived from a purely longitudinal Lorentz vector potential \ underline { A }. 25. This is also true in electrodynamics since you can do a gauge transformation which will only affect the vector potential tomorrow. 26. This is why sometimes the electric potential is called the scalar potential and the magnetic potential is called the vector potential . 27. These four polarizations seemed to correspond to the four components of the relativistically covariant vector potential A ^ { \ mu }. 28. In the potential formulation, there are only four components : the electric potential and the three components of the vector potential . 29. Sharper upper limits on the speed of light have been obtained in experiments designed to detect effects caused by the galactic vector potential . 30. Just as the phase of the wave function depends upon the magnetic vector potential , it also depends upon the scalar electric potential.
