Physics (AS & A Level) · May / June 2019 · Paper 13 · Question 21
The graph shows the variation of displacement y with distance x along a progressive wave at one instant in time. What is the phase difference between points P and Q on the wave?
- A90°
- B270°
- C540°
- D630°
As printed in the paper
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Correct answer: C. 540°
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