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3.) An optical fiber is covered by a layer of glass, to protect its surface. The index of refraction of the core is n1 = 1.8,

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Thanks for asking ..ni=1.8 n2=1.5 d= 0.2mm Oc= critical = bin angle 1.8 O = 56.443° And sin 12 Sino-R (Rtd) b) Por light to not leave the core, o

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