Superposition of waves (2)

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  • Created by: Sevdeg
  • Created on: 10-05-14 11:20
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  • Superposition of waves (2)
    • Interference: A phenomenon of superposition of waves propagating through space.
      • Constructive interference: When two waves arrive at a point in phase they add up.
      • When two waves are antiphase they cancel out resultant wave is zero. We expect silence (destructive interference)
    • Path difference:Extra distance travelled by one of the waves compared with the other
    • Constructive interference: Path difference    nl
    • Destructive interference: Path difference is (n+1/2) l
    • Coherence:Coherent sources emit waves that have a constant phase dif.
    • Two waves can only have a constant phase dif if their frequency is the same!


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