Your answer is partially correct.The figure shows an optical fiber in which a central plastic core of index of refraction n, = 1.60 is surrounded by a plastic sheath ofindex of refraction n2 = 1.52. Light can travel along different paths within the central core, leading to different travel times through thefiber. This causes an initially short pulse of light to spread as it travels along the fiber, resulting in information loss. Consider light thattravels directly along the central axis of the fiber and light that is repeatedly reflected at the critical angle along the core-sheathinterface, reflecting from side to side as it travels down the central core. If the fiber length is 370 m, what is the difference in the traveltimes along these two routes?NUmberi98.7Unitsns

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