(a)[1]
State how the intensity of a wave is related to its amplitude.
(b(i))[2]
Calculate the frequency of the microwaves.
(b(ii))[3]
Describe and explain the microwave intensity detected at $X$.
(b(iii).1)[1]
Describe the change to the interference pattern along the detector path when the wavelength of the microwaves decreases.
(b(iii).2)[1]
Describe the change to the interference pattern along the detector path when the phase difference between the microwaves emitted by the sources changes to $180^{\circ}$.
(c(iii))[2]
Describe the effect on the interference pattern along the detector path for each separate change below. 1. The wavelength of the microwaves decreases. 2. The phase difference between the microwaves emitted from the sources changes to $180^{\circ}$.