The distance between adjacent intensity maxima can be increased by
decreasing the frequency of the microwave signal.
decreasing the distance DDD between the transmitters and the receiver line.
increasing the separation ddd of the two transmitters.
increasing the power of the microwave transmitters.
37 exam-style questions on AQA A Level Physics Refraction, diffraction and interference, covering Interference, Diffraction, and Refraction at a plane surface. Each one has a worked solution and a mark scheme showing where the marks go.