Hey everyone, I just got an idea today surfing the web on Wikipedia. I noticed that in Berlin (i think there) they have these light tubes that stick out of the ground that take the light from the sun outside and the light goes through the tube and lights up the subway system. I thought it was a genius idea, but I wanted to make one on a smaller scale for an extra credit lab and CAD computer case project. To think about throwing the most light, I thought of using mirrors, but it felt wrong. But then, I was watching Law & Order and they were questioning the suspect in an investigation room with one way plexiglass. Then it stuck me, why not create that same effect for the inside of the tube? When I say this, I mean, you look from the outside of the tube and you can see in. And looking from the inside out, it would be a mirror. Have I lost you yet?:grumpy: I looked up the formula on how to do it in my chemistry class, but then I started questioning the whole experiment. Like: - Can the light go from the outside of the tube into the inside? - Would the light just constantly reflect on the inside or would it escape out? - Would the tube glow bright or glow at all? So, now I'm here. I asked my bro who is a physics professor in Sacramento, but he takes too long. Can anyone help explain it to me? Thanks.