A-LevelPhysicsSuperposition9702/12 · May/June 2023 · Q251 Mark
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.
✓ Correct answer
A: They must have a constant phase difference.
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