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summaries3 - Physics 7C Fall 2009 lecture bullet points...

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Physics 7C, Fall 2009 lecture bullet points VII-XIV I will write briefly the “bullet points” covered in each lecture. If you missed a lecture, you will definitely need to look at someone’s notes or the textbook, but this may help you know where to look. Lecture VII : Finish electromagnetic spectrum (Giancoli 31) and basic wave properties. Index of refraction: speed of light is different in media with different dielectric constant . Intuitive derivation of Snell’s law from principle that light takes the fastest path from A to B (“lifeguard at beach” analogy). Examples of Snell’s law: light bends closer to the normal in the medium with the higher index of refraction. Giancoli 32. Lecture VIII : Maxwell’s equations at a boundary (not in Giancoli) as justification for ray model of light. Assump- tions in ray model. Angles of reflection and refraction (Snell’s law). Brewster’s angle (polarization by reflection). Total internal reflection. Dispersion. Plane mirror. Giancoli 32.
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