explain internal refraction in optic fibre

Asked by jbathini | 19th Apr, 2009, 08:13: PM

Expert Answer:

When light enters the optical fibre, it strikes the interface in denser medium at an angle, that is greater than the  ‘critical angle’ and is totally reflected back in the same denser medium .This happens each time the light ray strikes the wall and it travels inside the fibre. Only when it reaches the other end, it is allowed to exit the fibre. This phenomenon is called total internal reflection.

Answered by  | 19th Apr, 2009, 10:07: PM

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