1. Announcements 1/18/12 Prayer

2. The electric field E, electrion polarization P, and electric susceptibility , are related through which equation? a. a. b. b. c. c. d. d. Review Quiz (ungraded)

3. Index of refraction

4. The “Lorentz model” assumes which of the following? a. a.Electron accelerated by force from oscillating electric field b. b.Electron decelerated by drag force c. c.Electric attached to nuclei by spring force d. d.Two of the above e. e.A, B, and C Reading Quiz

5. Lorentz model handout “Driven, damped harmonic oscillator”

6. Reading Quiz Which of the following is an appropriate graph of n(  ) in the Lorentz model? (Incidentally, you’ll have to graph this with a computer for problem P2.4.) a. a. c. b. b. d.

7. Lorentz model, cont. How does this oscillator model relate to index of refraction?

8. In a material with electrons that have different resonant frequencies, the strength of each contribution to the optical properties is called the ____________ strength a. a.frequency b. b.optical c. c.oscillator d. d.plasma e. e.transition Reading Quiz

9. Normal Dispersion From Hecht, pg 72