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There are some things that ray optics is not sufficient for, for example sub-wavesize structures and simulation. Also ray optics does not take into account [[diffraction]].
There are some things that ray optics is not sufficient for, for example sub-wavesize structures and simulation. Also ray optics does not take into account [[diffraction]].
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+Ray optics was thought of by Greeks a long time ago in a simpler form. It was thought that rays of light emanated from the eyes and out into the world. This is false, but the concept of rays has carried through.