Hi. I am having trouble visualising radio waves. Assuming a perfect isotropic antenna (I know they don't exist) an electromagnetic is just a spherical pulse that radiates outward, this is quiet easy to visualise. However all texts refer to the magnetic and electric fields being 90 degrees apart, which leads one to believe that one field is parallel with the earth and the other is perpendicular (if antenna was placed perpendicular). With the isotropic antenna, electric and magnetic fields would surely be experienced in every possible direction and not at 90 degrees to each other. Can someone please help me see this. It is driving me crazy and cannot get an answer anywhere. Thanks, Mark.