Question

Define numerical aperture and angle of acceptance. An optical fiber has a numerical aperture of 0.20 and cladding refractive index of 1.59. Calculate the refractive index of the core material and the acceptance angle of the fibre in water whose refractive index is 1.33.

22 Jan 2025
Answer :
Word Count : 171
To solve this, let's break it into two parts: ### 1. Numerical Aperture and the Refractive Index of the Core The numerical aperture (NA) of an optical fiber is given by the formula: \[ NA = \sqrt{n_{\text{core}}^2 - n_{\text{cladding}}^2} \] Where: - _________ ____ _________ __________ _______ ______ __________ ____ _________ ______.
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