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A sept index fibre has a relavitive refr...

A sept index fibre has a relavitive refractive index of `0.88%`. What is the critical angle at the core-cladding interface?

A

`60^(@)`

B

`75^(@)`

C

`45^(@)`

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
D
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