We now employ our knowledge of wave mechanics to the phenomenon of light. Once again we will find that while it comes from a very different source from other waves we have studied, and while it has s...We now employ our knowledge of wave mechanics to the phenomenon of light. Once again we will find that while it comes from a very different source from other waves we have studied, and while it has some unique properties we have not seen before, our knowledge of waves still goes a long way.