It a lovely summer weekend morning. We relax in our living room with the sunlight coming gently through the windows. We glance outside and can see the green leaves and watch birds in the yard. We can do this thanks to the windows we have in nearly every room in our home. We see them in our neighbors homes, in stores and restaurants, in office buildings, and more. They are so commonplace in our lives that we dont stop to think about how they work the way they do at all. Home windows as we know
