Converging light.

Interference is a phenomenon meant for waves. Being sound a wave, though longitudinal, it can form the interference pattern.

Because, there is destructive interference that occurs there.

Interference effects can be observed with all types of waves, for example, light A simple form of interference pattern is obtained if two plane waves of the same Optical interference between two point sources for different wavelengths and

sustained interference are those in which the position of bright and dark fringes are fixed on the screen.