Day 119: Drawing Lots of Lens Diagrams

We drew lots of ray diagrams today. Lots of them. Other than calling lenses mirrors, we seem pretty comfortable with them. Once you know lenses, though, and go back to mirrors, it gets confusing. 

We also seemed confused about what side of a lens you need to be on to see the image. We tried it in lab and then talked about why that makes sense.

We then started practicing some of the old AP Physics B questions on reflection and refraction and then last year's AP Physics 2 question on reflection and refraction. We'll talk about how to think about AP Physics 1 and 2 questions tomorrow. It's the first time I've spent a significant chunk of time about what the exam looks like.