Question an optical fiber of core radius 100 m has a core, Ask an Expert

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Question: An optical fiber of core radius 100 m, has a core refractive index of 1.490 and a cladding refractive index of 1.475.

Part A: At what bending radius does a ray, travelling along the fiber axis (i.e. without skips) strike the cladding at the critical angle in the bend?

Please show all work and steps I am really trying to learn this for my exam.

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