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Created page with "== Introduction == Wave optics, also known as physical optics, is the branch of optics that studies interference, diffraction, polarization, and other phenomena for which the ray approximation of geometric optics is not valid. This usage tends not to include effects such as quantum noise, which is studied in the quantum theory of light. Image:Detail-53979.jpg|thumb|center|A close-up view of a light wave propagating..."
