n optical fibre (μ = 1.72) is surrounded by a glass coating (μ= 1.50). Find the critical angle for total internal /reflection at the fibre-glass interface.

n optical fibre (μ = 1.72) is surrounded by a glass coating (μ= 1.50

1.	n optical fibre (μ = 1.72) is surrounded by a glass coating (μ= 1.50). Find the critical angle for total internal /reflection at the fibre-glass interface.
Answer» tical FIBRE (μ = 1.72)glass COATING (μ= 1.50)CRITICAL angle:sin i/ SINR = μ2/μ1 sin c/ sin 90 =1.5/ 1.72= 75/86 c= sin⁻¹(75/26)

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n optical fibre (μ = 1.72) is surrounded by a glass coating (μ= 1.50). Find the critical angle for total internal /reflection at the fibre-glass interface.

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