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Optical path (OP) is the trajectory that a light ray follows as it propagates through an optical medium. The geometrical optical-path length or simply geometrical path length (GPD) is the length of a segment in a given OP, i.e., the Euclidean distance integrated along a ray between any two points. The mechanical length of an optical device can be reduced…
Applications, Simple materials used & Factors affecting optical path
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optical path length gpd medium materials op ray light two trajectory segment follows propagates geometrical optical-path simply given euclidean distance
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