Answer to Question #349933 in Optics for Nigam Dharni

Question #349933

Internal critical angle in core at core cladding interface of a step index fiber 78.6. The refractive index of cladding is 1.45 what is refractive index of core

Expert's answer

"\\sin\\theta_c=\\frac{n_2}{n_1}"

"n_2=n_1\\sin\\theta_c\\\\\n=1.45*\\sin78.6^\\circ=1.42"

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