Reflecting on the Reichstag

 The government buildings next to the Reichstag in Berlin showed nicely the way that glass can both transmit and reflect light. I think the idea of the glass wall is to show the transparency of the democratic process. Articles of the constitution are written on the glass. It's very effective. In the first picture I am almost looking down the normal line. You can easily see the light transmitted from the building inside but the reflection is not very significant. Below, the angle to the glass is more acute so the angle of incidence, measured to the normal line, is much bigger.

 Below is almost total internal reflection. TIR is less effective in the foreground because the angle of incidence is much smaller. This is not the sort of example that you find in a text book because across this long surface there are many different rays at many different angles. Most of them are higher than the critical angle.

 And finally there was the Moon reflecting the light of the Sun...