+The **wave equation** is a fundamental [Partial Differential Equation](/wiki/partial_differential_equation) that describes the propagation of [Wave](/wiki/wave) phenomena. It reveals how disturbances, like sound or light, travel through a medium or empty space.
+## See also
+- [Sound](/wiki/sound)
+- [Light](/wiki/light)
+- [Vibration](/wiki/vibration)
... 1 more lines