How To Use The Wave Speed Equation. Using the separation of variables technique, we actually wind up with two differential/wave equations: Closely related to the 1d wave equation is the fourth order2 pde for a vibrating beam, u tt = −c2u xxxx 1we assume enough continuity that the order of differentiation is unimportant.

I must use the wave equation to to find the speed of a wave. A light wave travels with a wavelength of 600 nm. 0 0 m m) h [(3 0 m − 1) x + (6.