Q. What is an optical fibre ? [PTU 2004 ]
:- It is a narrow cylindrical structure of glass core surrounded by a cladding of slightly lower refractive index. The core diameter usually varies between 8 micrometer to 100 micrometer whereas cladding diameter varies from 125 micrometer to140 micrometer.
:- It is a narrow cylindrical structure of glass core surrounded by a cladding of slightly lower refractive index. The core diameter usually varies between 8 micrometer to 100 micrometer whereas cladding diameter varies from 125 micrometer to140 micrometer.
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