This is not guesswork, if one evening you lie in the garden feeling bad because of a breakup or other reasons and watch the shadow of the lights, you can get si

This is not guesswork, if one evening you lie in the garden feeling bad because of a breakup or other reasons and watch the shadow of the lights, you can get similar results. Introducing Fourier transform into optics can indeed explain some phenomena, I can't recall the specifics, but it is related to the shape formed between the light and the fence.