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A step index fibre has critical angel at...

A step index fibre has critical angel 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
`(mu_(1)-mu_(2))/(mmu_(1))=(0.88)/(100)`
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