an equation in physics that helps you find out the length or shape of a wave (= the pattern in which some types of energy, such as sound, light, and heat, are spread or carried)

Erwin Schrödinger's best-known equation is a wave equation that is considered a landmark in the development of quantum mechanics. 埃尔温·薛定谔最著名的方程是波动方程，它被认为是量子力学发展的里程碑。

Many wave equations have good approximations that can be used for very high frequency solutions.