I touched upon the topic Phase Shift, which includes a great deal of details, in the book a little. I will show you a situation that I noticed while I was working on (c+v)(c-v) mathematics. I showed only this situation in the book anyway.
There are two animations below. In the animations, three different signal transmitters broadcast towards a plane. While the signal towers broadcast by following the target in the first animation, the signal towers in the second animation broadcast in a fixed direction without following the target.
In order to compare the signals that come from three directions, the animation reaches its final position after the signals reach the plane. In this last phase, the signals that come to the plane from the top, middle and the bottom are overlapped on the X axis. In this way, by comparing the waveforms of the signals with each other, we can understand in what way the signals that are sent to the plane from different directions arrive at the plane.
After playing both the animations, please compare the final states with each other. By using the slider bars, you can zoom in and make it easy to see.