Final answer:
A Moire pattern occurs when two sets of parallel lines are superimposed, creating an interference pattern that can be visually perceived as wavy or rippled.
Step-by-step explanation:
The wavy pattern that results when two geometrically parallel lines are superimposed is referred to as a Moire pattern. This effect occurs when two sets of patterns with similar but slightly offset details overlap, creating a new pattern that can look like it is moving or has depth, due to the interference of the lines. This effect is not only a visual phenomenon but also relates to the concept of interference fringes in physics, which occurs when coherent waves, like light waves, overlap and produce regions of constructive (bright fringes) and destructive interference (dark fringes), somewhat similar to the effect seen when two sets of parallel lines intersect in a moire pattern.