I know this isn't the first thread on this issue but I'm hoping some of you brainiacs can clear up something for me please. I have been living under the understanding that light doesn't travel through glass but rather the glass itself replicates the emf. I learned this a many years back from some people I regard as pretty smart but I have since read numerous topics about light travelling through glass written by pretty smart people as well. So... Does light actually travel through glass or not?