Glitter, Members. Is there anything it can’t do? It bedazzles our pop stars, turns our white silk pumps into ruby slippers and makes our protests aptly durable. What about tiny, reflective bits of Euclidian surface area is not a magnet for the mammalian eye? This week, there will be bright shiny things everywhere, so let’s hear it for the air in between and the wavefronts therein that bounce around from origin to interface and back to origin again.