StellarHuygens Principle
A property that arises due to the wave nature of light is Huygens Principle. Every “wave front” of a light wave consists of infinitely many circularly propagating waves called wavelets that sum together to make a single wave front. This principle causes light to behave strangely around thin slits or corners.
As seen in the image above, each wave front (essentially the crest of a wave) is made by the constructive interference of the circular waves.