The path that light takes in traversing an optical is often called the optical path. The physical length of an optical device can be reduced to less than the length of the optical path by using folded optics. The optical path length as defined in optics is the length of the path multiplied by the index of refraction of the medium.
Read more about Optical Path: Factors Affecting Optical Path, Simple Devices Used
Famous quotes containing the words optical and/or path:
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