Physics (AS & A Level) · Oct / Nov 2021 · Paper 13 · Question 27

Two progressive waves travel in opposite directions and form a stationary wave. The graph shows the variation with distance x of the displacement of the stationary wave and of one of the two progressive waves at the same instant in time. What are the approximate displacements of the other progressive wave at the positions J, K and L?

1. AJ: -5, K: 0, L: -10
2. BJ: -5, K: +5, L: 0
3. CJ: 0, K: +5, L: +10
4. DJ: +5, K: -5, L: 0

As printed in the paper