All other waves in nature need a medium to propagate. How do light and other pure energy and electromagnetic waves maintain integrity in the vacuum of space with no medium to interact with? Google answer is lame... "electromagnetic waves do not need any medium because they don't transfer energy through the medium. sound on the other hand just transfers energy to the air molecules making them vibrate and transfer energy to adjacent molecules etc till they reach your ear." One would think that photons would just disperse randomly without any inhibiting factor. The same should go for all radiated energy. Anybody know a believable answer to this question?