(a(i))[1]
State the name of the process that takes place as the wave travels from region A into region B.
(a(ii))[1]
Suggest a reason for the wave changing direction.
(b)[2]
On Fig. 6.2, sketch a wave with half the amplitude and a higher frequency than the one shown.
(c(i))[1]
Explain the reason for this.
(c(ii))[2]
Calculate the wavelength for sound of frequency $1100\,\text{Hz}$ travelling at this speed.