Preemptiveness

Thursday, there will be no lab. Before you become unreasonably distraught, let me explain our alternative plan.

The plan is the following: we finish the lenses material and solve some problems for the first 45 minutes. What we have left is basically to pull together all of the arcane geometry we have used so far and put it into practice - as you did in the lab yesterday. I wasn't joking, we really have done all the math we need for every lens problem you will encounter, the rest is just artwork. Thus, a lot of the first half of class will involve practical examples rather than geometrical proofs.

And then, during the second half of class, there is the preemptiveness. The second half of the class will be entirely devoted to exam II review. Come ready with any and all questions, and I will attempt to answer them for about an hour.

If you don't come with questions, I will invent my own and answer those ... which is usually far less interesting from your point of view.