[Solved] Single mode fibers allow single mode propagation; the cladding diameter must be at least

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Q.	Single mode fibers allow single mode propagation; the cladding diameter must be at least
A.	twice the core diameter
B.	thrice the core diameter
C.	five times the core diameter
D.	ten times the core diameter
Answer» D. ten times the core diameter
Explanation: the cladding diameter in single mode fiber must be ten times the core diameter. larger ratios contribute to accurate propagation of light. these dimension ratios must be there so as to avoid losses from the vanishing fields.

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