Wave Pattern

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Can someone help me out in this physics question about waves please?

Two radio transmitters, T1 and T2 emit vertically polarised e-m waves at a frequency of 1.44 MHz. A stationary wave pattern is set up along the line T1T2.

A car is driving along the line between the transmitters and its radio is receiving the programme carried by the 1.44 MHz waves. Describe what the driver hears if the car is travelling at just over 30 ms^-1.

Can someone help me please?

When stationary waves are formed the amplitude of the wave drops to a minimum at the nodes and increases to a maximum at the anti nodes
.
The car driver hears the the sound from the radio to be rising and falling or waxing and waning.
The sound is maximum when he is at the anti node and minimum at the node.

f = 1.44 x 10^6 Hz
λ = c / f = 3 x10^8 / 1.44 x 10^6 = 208.33 m
Distance between the consecutive nodes or anti nodes is λ / 2 = 104.16 m
As the driver travels with a velocity
v = 30 m/s, the sound intensity drops to a minimum every t = d / v = 104.16 / 30 = 3.472 s
Midway between the two minimum there is a maximum sound

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