Calculate the refraxive index of core and cladding material of fibre from the following data NA =0.27 and Δ0.03
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=> Refractive index n1 of core is defined as: n1 = c / v, where c = 3×10 8 m/s is the speed of light in vacuum and v is the speed of in the core. Maximum size of angle t must be smaller than 21° in order to have total internal reflection at the core-cladding interface.
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