Even if our measurements show the same velocity over different sections, it may be asserted that the motion is uniform only with the deGREe of accuracy that the measurements were made with.

A small ball is making circular motion at the uniform velocity, the centripetal force has suddenly increased, it is proved that the small ball will generally make a spiral motion.

This paper proves representatives of E and H to radiation field producing by low-velocity uniform Circular motion charge in vacuum and then discusses various states of polarization to radiation field.