1. Announcements 3/9/12 Prayer Exam 2 ends Saturday afternoon
Typo on exam equations (doesn’t affect any problems): first equation under “Gaussian wavepacket”, for F.

2. Reading Quiz
What is the equation with the strange name in today’s assignment?
the aneilok equation
the eikonal equation
the keilano equation
the lonakei equation
the nokeila equation

3. (Today’s quiz brought to you by the letter F.)
Reading Quiz
Who deduced the principle that says light rays moving from pt A to pt B will take the path that takes the least amount of time?
Faraday
Fermat
Fresnel
Fourier
Fraunhofer
(Today’s quiz brought to you by the letter F.)

4. The Eikonal Equation

5. Fermat’s Principle

6. The Lifeguard Problem

7. Reading Quiz What are ABCD matrices good for?
describing the change in angle and position of a ray
describing the change in polarization of a ray
describing the interference between light rays
nothing

8. Ray Vectors and ABCD Matrices