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What are stationary waves? Why are they called stationary waves? - Physics

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Question

What are stationary waves? Why are they called stationary waves? 

Short Answer
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Solution

  1. When two identical waves travelling along the same path in opposite directions interfere with each other, the resultant wave is called a stationary wave. 
  2. Stationary waves are called so because the resultant harmonic disturbance of the particles does not travel in any direction and there is no transport of energy. 
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Chapter 6: Superposition of Waves - Short Answer I

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