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SS17C_4

# SS17C_4 - Physics 7C SS1 Lecture 4 Hitting an Interface...

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Physics 7C SS1 Lecture 4 Hitting an Interface Standing Waves Review 2D Interference

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2 Reaching the end of a medium Observe reflection on the wave machine… “Incident” QuickTimeª and a TIFF (Uncompressed) decompressor are needed to see this picture.
3 Hitting an Interface Inverted Upright What happens if we send a continuous wave down the machine, it reflects, and the incoming & reflected waves interfere?

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4 Superposition of 2 traveling harmonic waves The period and wavelength are exactly the same. One wave travels to the right, one to the left.
5 Standing Waves Fundamental

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6 Standing Waves 2nd Harmonic 3rd Harmonic N = “node” A = “antinode”
7 Standing Waves 2nd Harmonic 3rd Harmonic What type of interference occurs at a node? a) Constructive b) Destructive c) Time-dependent d) Depends which node

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8 Standing Waves 2nd Harmonic 3rd Harmonic What type of interference occurs at an antinode?
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