19.1-19.2, due on November 20

• The book was totally right. I understand NOTHING about quantum mechanics. I do understand light and the example they gave was more understandable to me. I understood when they were talking about the lenses and the light going through the lenses. The part where I got lost is where they started talking about WHY the light can go through all three lenses, but not through just two. Not a physics person...
• It was cool to see how they can use this quantum mechanics to generate conversation between two parties. Not that I understand that all the way either, but it was interesting to read about anyway. The new notation was throwing me off a little bit, too.