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174. Choose the true sentence about the optical path:A.The product of the geometric path d traversed by a light ray through atransparent medium and the absolute refractive index n of that medium iscalled the optical pathB.The ratio between the geometric path d traversed by a light ray through atransparent medium and the absolute refractive index n of that medium iscalled the optical pathC.The optical path is therefore equal to the geometric path that light would travelin the air, in the same time interval in which it travels the respective distancein the given medium.D.The actual path of a light ray between two points is that for which the opticalpath always has a minimum valueE.The actual path of a light ray between two points is that for which the opticalpath always has a maximum value
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