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Physics (AS & A Level) · Oct / Nov 2022 · Paper 13 · Question 25

9702Stationary waves

Two progressive waves overlap. What is an essential condition for the two waves to form a stationary wave?

  1. AThe waves are longitudinal.
  2. BThe waves are polarised.
  3. CThe waves travel in opposite directions.
  4. DThe waves travel in the same direction.

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Correct answer: C. The waves travel in opposite directions.

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