Physics (AS & A Level) · Feb / March 2018 · Paper 12 · Question 22

A wave has period $T$, wavelength $\lambda$ and amplitude $A$. The wave is shown on a graph of displacement $x$ against distance $d$. Which graph is correctly labelled?

1. AGraph A: displacement x against distance d, with λ marked between two adjacent troughs and A marked as the amplitude from the equilibrium axis to a crest.
2. BGraph B: displacement x against distance d, with T marked between two adjacent troughs and A marked as the amplitude from the equilibrium axis to a crest.
3. CGraph C: displacement x against distance d, with T marked between two adjacent crests and A marked as the peak-to-peak vertical distance.
4. DGraph D: displacement x against distance d, with λ marked between two adjacent crests and A marked as the peak-to-peak vertical distance.

As printed in the paper