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Wave Interactions

Wave Interactions

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Wave Interactions

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  1. Wave Interactions

  2. Reflection • The bouncing back of a wave when it meets a surface or boundary.

  3. Diffraction • The bending of a wave as it passes an edge or an opening. • This is why you can hear sound around a corner.

  4. Refraction • The bending of waves as they pass from one medium to another. • “Broken pencil” trick

  5. Interference • Waves that exist in the same place at the same time experience interference.

  6. Interference • Constructive: Two crests or two troughs will add together to make a larger crest or trough. They do not average out. • Destructive: Crest meets trough; amplitude is smaller or completely cancels out.

  7. Interference • Of light: creates rainbows in oil or soap bubbles. • Of sound: creates beats in music.

  8. The Doppler Effect • The apparent change in frequency of a moving object to the observer. • Ex: NASCAR, ambulance