Question

What will be the effect of scratches on optical fibre cable?

Answer 1

HEYA..!!

If there are any scratches on the optical fibre cable, the light signal can escape at such points. It is because, a ray of light can meet the surface of the scratch at an angle of incidence less than the critical ang. To ensure that the core of the cable stays smooth, the outher coating of the fibre cable has to be made tougher.

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Answer 2

here's your answer

- incendent angle will be less than critical angle .