Whose work first showed that light can behave like a wave through interference?

Thomas Young performed his famous double-slit demonstration in the early 19th century and used it to argue that light has wave properties. When light passes through two narrow slits, the overlapping waves create bright and dark bands on a screen. This was one of the strongest early arguments against a purely particle view of light. Young’s work became a cornerstone of wave optics and later influenced quantum physics.