A-LevelPhysicsWaves9702/12 · Feb/Mar 2020 · Q211 Mark
A wave of frequency 15 Hz travels at 24 m s¯¹ through a medium. What is the phase difference between two points 2.0 m apart?
AThere is no phase difference.
BThey are out of phase by a quarter of a cycle.
CThey are out of phase by half of a cycle.
DThey are out of phase by 0.80 of a cycle.
✓ Correct answer
B: They are out of phase by a quarter of a cycle.
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