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## Main Question or Discussion Point

Electromagnetic wave are said to travel with velocity c, in vacuum and are also said to be a transverse wave. But consider this:

Let a positive charge Q be at point P of a three dimensional space.

Let this charge, at time t=0, begin an uniform circular motion with angular velocity OMEGA = 2 Pi rad/s and with radius R = 1 m. It moves just one turn to make things simpler.

Supose we (the observers) are very distant from P but in the plane of the particle's circular path. Let this distance be 10 light-seconds for instance.

At our position we will experience after t = 10 s, modifications on the electric field generated by the charged particle. It just so happens that in some part of the circular path the particle has come nearer to us, and in the other, the particle has gone farther, so that the field has presented not only transverse modifications but logitudinal modifications as well. Aren't these logitudinal modifications considered part of the radiation emitted by the particle ? Does these longitudinal dynamics of the field propagates with c also ?

Best Regards,

DaTario

Let a positive charge Q be at point P of a three dimensional space.

Let this charge, at time t=0, begin an uniform circular motion with angular velocity OMEGA = 2 Pi rad/s and with radius R = 1 m. It moves just one turn to make things simpler.

Supose we (the observers) are very distant from P but in the plane of the particle's circular path. Let this distance be 10 light-seconds for instance.

At our position we will experience after t = 10 s, modifications on the electric field generated by the charged particle. It just so happens that in some part of the circular path the particle has come nearer to us, and in the other, the particle has gone farther, so that the field has presented not only transverse modifications but logitudinal modifications as well. Aren't these logitudinal modifications considered part of the radiation emitted by the particle ? Does these longitudinal dynamics of the field propagates with c also ?

Best Regards,

DaTario