Thank you Tony. 

I was asking my course mentors and they said it doesn't but looking at  the
diagrams it seems to do that. Even the lines in the diagram show direction
change, which in all magnetic field diagrams the line of force are
directional.

I was thinking the polarity .. could be the cause of defraction for obsticals
smaller than the wave length. The polarity and charge oscilation defracts on
like charge or magnetic field as the wave (photon) passes near field forces. 

Then I thought more probably does happen but it doesn't explain why the
longer wave lengths wouldn't defract consistently near a like charge, or even
attracted to a opposite charge.

--- Mystic BBS v1.12 A31 (Windows)