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The step index fiber has a relative refractive index difference of 0.86% what is the critical angle at the core cladding interface? 

(A) 28.4° 

(B) 82.4° 

(C) 24.8° 

(D) 75.6°

1 Answer

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Best answer

The correct option is (B) 82.4°.

Explanation:

Relative refractive index difference = Δ = 0.86% = [(0.86) / 100] = 0.0086

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