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An optical fibre is made of glass fibre of refractive index 1.68. The outer coating of the glass fibre is made of material of refractive index1.44. What is the range of angles of the incident rays with the axis of the pipe for which total internal reflection inside the optical fibre takes place?

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To solve the problem of finding the range of angles of incident rays for which total internal reflection occurs in an optical fiber, we can follow these steps: ### Step-by-Step Solution: 1. **Identify the Refractive Indices**: - The refractive index of the glass fiber (core) is \( \mu_1 = 1.68 \). - The refractive index of the outer coating (cladding) is \( \mu_2 = 1.44 \). ...
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