Stationary Waves includes the following learning objectives:

  • Apply the principle of superposition to determine the resultant displacement of two waves;
  • Describe the nature of standing (stationary) waves and how they are formed;
  • Compare standing and progressive waves;
  • Identify node and anti-node positions;
  • Discuss the modes of vibration of strings and air with open and closed ends;
  • Investigate the effects of length, tension and mass per unit length on the frequency of a vibrating string;
  • Use the expression for the wave speed and fundamental frequency of a stretched spring;
  • Determine the speed of sound in air using standing (stationary) waves.

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