There’s nothing particularly quantum about this—waves create interference patterns all the time, whether they’re overlapping waves from two stones thrown in a pond or sound waves coming from two stereo speakers. Wave interference isn’t mysterious: in spots where the peaks of one wave line up with the valleys of another, they cancel out and the waves vanish; when the peaks of both waves line up with each other, they’re amplified. This creates the patterns of dark and light bands in Figure 5.2.
just wow
