This virtual movement is why a magnet will pull and push another magnet - but will always pull soft iron. An electron that crosses the path of virtual magnetism will be deflected and will appear to be negative. It is only a chain reaction of energy moving down the wire and not electrons. Imagine the dead center is a light source. All electromagnetic transmissions, radio for example, work on the same principle.
All light is white, colors are white light compressed to a greater or lesser degree.
Since the front of a fast expanding pulse will be more compressed than its rear, the front would show up as a shorter blue wave and the rear of the shell as red. Light will lose speed as it travels along and the original white will turn to red. It is not possible for the light of stars to bend near the sun because there are no rays. The gravitational pull will be the strongest in the center but the pull will extend far beyond the atom s outer shell. The same logic explains why we are kept on the ground, why the sun attracts the earth, and why the center of our galaxy keeps the sun in its place.