Sorry Vern - carry on. And thanks to others who helped me correct my view. I do remember that the Poynting vector is ExB and that sin & cos are orthognal when integrated over 2 pi so if I were correct, then light and EM waves in general could not transport energy. Some where in the last fourty or so years the idea that the collapsing B field generated the rising E field displaced the correct view in my head. again thanks for correcting me.