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Announcements 1/18/12

Learn about the relationship between electric field, electron polarization, and electric susceptibility, as well as the Lorentz model and its connection to index of refraction. Explore the driven, damped harmonic oscillator and the concept of normal dispersion in optical properties.

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Announcements 1/18/12

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  1. Announcements 1/18/12 • Prayer

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

  3. Index of refraction

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

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

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

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

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

  9. Normal Dispersion From Hecht, pg 72

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