A silicon optical fibre with a core diameter large enough has a core refractive index of 1.50 and a cladding refrcative index 1.47.Determine(i)the critical angle at the core cladding interface.(ii)the numerical aperture for the fibre.(iii)the acceptance angle in air for the fibre.

Explanation

To solve the problem step by step, we will address each part of the question systematically.

### Given Data:
- Refractive index of the core (n_core) = 1.50
- Refractive index of the cladding (n_cladding) = 1.47
- Refractive index of air (n_air) = 1.00

### (i) Determine the Critical Angle at the Core-Cladding Interface
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