There's also an engaging image of the rooftop bar at the Ravel Hotel in Long Island City, where, based on the sparse crowd, long shadows and two female servers in little black dresses chatting idly, the evening cocktail hour is just getting going.
They discovered that by shifting the "phase" of light so that the peaks of one wave line up with the valleys of an adjacent one, the two cancel each other, creating "shadows" between waves that are smaller than the waves themselves(see diagram, p. 141).
However, when the moon is between the telescope and the source of the cosmic rays, Dr Colin and his colleagues reckon that it will be possible to separate the two by looking at the edges of the shadows.