\relax \@writefile{toc}{\contentsline {subsection}{\numberline {4.1}The electromagnetic force on a moving charge}{28}} \@writefile{toc}{\contentsline {subsection}{\numberline {4.2}The electromagnetic field equations}{29}} \@writefile{toc}{\contentsline {subsection}{\numberline {4.3}Electromagnetic field equations in the Lorentz gauge}{30}} \@writefile{toc}{\contentsline {subsection}{\numberline {4.4}The four-current density}{31}} \@writefile{toc}{\contentsline {subsection}{\numberline {4.5}Identification of $E_{\mu \nu }$ with electric and magnetic fields}{31}} \@writefile{toc}{\contentsline {subsection}{\numberline {4.6}Summary}{32}} \@writefile{toc}{\contentsline {subsection}{\numberline {4.7}Transformation of the electromagnetic field between inertial frames}{32}} \@writefile{lof}{\contentsline {figure}{\numberline {1}{\ignorespaces }}{32}}