Among all the technology, computers, cell phones, radios etc. I think that the Electromagnetic Wave is a great contender for the greatest mass media invention. Without electromagnetic waves many of these things wouldn’t really work. An electromagnetic wave are invisible electronic impulses such as electricity, magnetism, light, some heat sources, and broadcast signals. Yes I’m sure technology would be possible today without electromagnetic waves however, it is the basis of radio technology which is used much more than one really thinks. Such as the new podcast being created for this class, electromagnetic waves are the source and base to create the radio podcast. Without these waves it wouldn’t work so well, we rely on electromagnetic waves for plenty of things which makes them a great contender for the greatest madd media invention.