b) Interference

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Last updated 9:18 PM on 4/18/26
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7 Terms

1
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  • define coherence


  • when two waves have the same frequency and wavelength

  • → and therefore a constant phase difference


2
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  • define stable interference


  • interference of two coherent waves


3
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  • define maxima

  • define minima


  • the point on a stable interference pattern where the two waves interfere constructively

  • the point on a stable interference pattern where the two waves interfere destructively


4
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  • define path difference


  • difference in distance two waves travel from their sources to where they interfere


5
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  • define in phase


  • when the phase difference is (n) × 360


6
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  • define antiphase


  • when the phase difference is (n + ½) × 360


7
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  • state the relationships between path and phase differences for waves in stable interference


  • if the path difference for two waves = integer × λ

  • → the two waves will interfere in phase

  • if the path difference for two waves = (integer + ½) × λ

  • → the two waves will interfere in antiphase


<ul><li><p>if the path difference for two waves = integer × λ</p></li><li><p>→ the two waves will interfere in phase</p></li><li><p>if the path difference for two waves = (integer + ½) × λ</p></li><li><p>→ the two waves will interfere in antiphase</p></li></ul><p></p>