Physics (AS & A Level) · May / June 2023 · Paper 12 · Question 25
9702Stationary waves
A stationary wave is formed by two progressive waves travelling in opposite directions along the same line of travel. Which statement about the two progressive waves is not correct?
- AThey must have a constant phase difference.
- BThey must have the same frequency.
- CThey must have the same wavelength.
- DThey must travel at the same speed.
As printed in the paper
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Correct answer: A. They must have a constant phase difference.
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