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Physics (AS & A Level) · May / June 2025 · Paper 12 · Question 30

9702Stationary waves

Two waves meet. What is not a necessary condition for the waves to produce a stationary wave?

  1. AThey must be of the same type.
  2. BThey must have the same period.
  3. CThey must have the same wavelength.
  4. DThey must travel in the same direction.

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Correct answer: D. They must travel in the same direction.

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