Ok, so Huygens described light as a wave. So my question is how does his wave theory explain the phenonmenon of dispersion? What happens when a wave of light hits a prism? How does while light split into the different colours os a rainbow? Also another question I have is about Maxwell's discription of light. The maxwell equations comprised of 4 imporant points:1) number of field lines is proportional to the charge,2) number of field lines leaving an about is 0,3) changing a charge induces a new magnetic field and 4) changing a magnetic field induces a new charge. my question is what feature of electromagnetic waves do polaroid sunglasses take advantage of? I mean how do polaroid lenses work in terms of electromagnetic waves?