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Lecture 2 - DL Section/Time Name Section 1 MR...

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DL Section/Time Name Section 1, MR 10:30am-12:50pm Robert Lynch Section 2, TR 2:10-4:30pm Vikram Vijayaraghavan Section 3, TR 4:40-7:00pm Vladimir Iglovikov Section 4, TR 7:10-9:30pm Julius DeRojas Section 5, TF 8:00-10:20am Josh Cooperman Section 6, MW 8:00-10:20am Josh Cooperman Section 7, MW 2:10-4:30pm Julius DeRojas Section 8, MW 4:40-7:00pm Rylan Conway Section 9, MW 7:10-9:30pm Rylan Conway
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Physics 7C Spring 2011 A/B Lecture 2: More with Waves
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Today’s Agenda Quiz 1 Review Total Phase and Phase Charts Wave Equation when there is a Source New Stuff Wavefront Representaion of 2D Waves Superposition of Waves Interference Phenomena in 1D
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Total Phase It tells us what about the displacement (i.e. min, max, in between) at any point in time and space (i.e. for any x and t values) The total phase is VERY IMPORTANT!!! ( 29 Φ = sin ) , ( A t x y φ λ π π + ± = Φ x T t t x 2 2 ) , ( Total Phase =
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Total Phase and Phase Charts Break the total phase into its 3 parts Evaluate each separately Determine whether the wave is at max, min, or in between Unit circle Wave 1 y(x, t) = A sin(2πt/T ± 2πx/λ + φ) 2πt/T ±2πx/λ φ Φ
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Wavefront Representation of 2D waves
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