05_01_FR_Waves - Today5/1 o Questions? o Waves (review) o...

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Today5/1 o Questions? o Waves (review) o phase shifts o interference o reftaction o lenses/mirrors o etc. .
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Interference in 2-D Sources “in phase” Crest meets crest and trough meets trough, constructive, loud sound or bright light Crest meets trough and trough meets crest, destructive, no sound or dark Crest Trough
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Interference in 2-D Sources “in phase” Constructive at a point if it is the same distance from each source Destructive at a point if it is 1 / 2 λ farther away from one source Crest Trough
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Interference in 2D Sources “out of phase” Crest meets trough and trough meets crest, destructive, no sound or dark Crest meets crest and trough meets trough, constructive, loud sound or bright Crest Trough
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Interference in 2-D Sources “out of phase” Destructive at a point if the point is the same distance from each source Constructive at a point if the point is 1 / 2 λ farther away from one source Crest Trough
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Reflections at Boundaries o Four situations Fixed end Free end Light to heavy Heavy to light
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Fixed End Reflections Fixed end Crest turns into trough Leading edge is the same See “Wave Interference” handout for how the string looks during the reflection. Same velocity, length, and amplitude
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Free End Reflections Free end Crest stays a crest Leading edge is the same See “Wave Interference” handout for how the string looks during the reflection.
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05_01_FR_Waves - Today5/1 o Questions? o Waves (review) o...

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