A-LevelPhysicsSuperposition9702/12 · Feb/Mar 2021 · Q261 Mark
Two waves, P and Q, meet at a point X and superpose. Initially, the two waves meet at X in phase (zero phase difference) so that the resultant wave has an amplitude of 14.0 cm at that point. The phase difference between the two waves is then changed so that they meet at X with a phase difference of 180°. The resultant wave now has an amplitude of 4.0 cm at X. What is the amplitude of one of the waves at point X?
A2.0 cm
B5.0 cm
C10 cm
D18 cm
✓ Correct answer
B: 5.0 cm
Practise more questions on this topic
Oracle Prep sorts past-paper questions by topic, so you can drill Superposition and see which topics are most likely to come up next.
Sign up free →