(a)[1]
State the maximum displacement of wave X from equilibrium.
(b(i))[2]
Both waves have a frequency of $16\ \text{Hz}$. Determine the speed of wave X.
(b(ii))[1]
State and explain whether X and Y are coherent.
(c)[2]
Wave X and wave Y superpose to produce a resultant wave. On Fig. 3.2, sketch the displacement of the resultant wave against distance from A at the instant shown in Fig. 3.1.
(d)[2]
The intensity of wave X is $I_X$. The intensity of wave Y is $I_Y$. Use Fig. 3.1 to find the ratio $\dfrac{I_X}{I_Y}$.