Physics (AS & A Level) · Oct / Nov 2025 · Paper 12 · Question 30
9702Stationary waves
Two progressive sound waves move in opposite directions and superpose to form a stationary wave. Which statement describes an antinode of this stationary wave?
- Aa position where the phase difference between the two waves is always 0°
- Ba position where the phase difference between the two waves is always 180°
- Ca position where the stationary wave has maximum amplitude
- Da position where the stationary wave has minimum amplitude
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Correct answer: C. a position where the stationary wave has maximum amplitude
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