21. Equations of wave motion are called " wave equations ". 22. :Yes, they add ( the wave equation governing sounds is a linear equation ). 23. Suppose we integrate the inhomogeneous wave equation over this region. 24. On the one hand, it resembles the classical wave equation . 25. These remaining degrees of freedom correspond to gauge functions which satisfy the wave equation 26. The wavefunction evolves according to the Schr�dinger wave equation , and the wavefunction never collapses. 27. This solution arises from the spatial solution of the wave equation and diffusion equation. 28. Maxwell's equations can be written in the form of a wave equation with sources. 29. See for a recent paper which compares fractional wave equations which model power-law attenuation. 30. This relativistic wave equation is now most commonly known as the Klein Gordon equation.
