In theoretical physics, the eikonal approximation (Greek εἰκών for likeness, icon or image) is an approximative method useful in wave scattering equations, which occur in optics, seismology, quantum mechanics, quantum electrodynamics, and partial wave expansion. == Informal description == The main advantage that the eikonal approximation offers is that the equations reduce to a differential equation in a single variable.
In theoretical physics, the eikonal approximation (Greek εἰκών for likeness, icon or image) is an approximative method useful in wave scattering equations, which occur in optics, seismology, quantum mechanics, quantum electrodynamics, and partial wave expansion. == Informal description == The main advantage that the eikonal approximation offers is that the equations reduce to a differential equation in a single variable.
Source: Wikipedia "Eikonal approximation" · CC BY-SA 4.0
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