If μ₁ and μ₂ are the refractive indices of the materials of core and cladding of an optical fibre, then the loss of light due to its leakage can be minimised by having
(a) μ₁ > μ₂
(b) μ₁ < μ₂
(c) μ₁ = μ₂
(d) None of these
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a is right answer
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