In a single-mode fibre, how does the fraction of energy travelling through bound mode appear in the cladding?

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Question:
 In a single-mode fibre, how does the fraction of energy travelling through bound mode appear in the cladding?

1.As a crescent wave

2.As a gibbous wave

3.As an evanescent wave

4.All of these

Posted Date:-2021-12-08 12:00:00

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