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Principle and working of optical fiber

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Principle and working of optical fiber

    • Posted by Prishav Das 8 years ago

    CBSE > Class 12 > Physics
    • 1 answers

    Tanuja Biswas 8 years ago

    Principle is multiple total internal reflection( tir). Optical fibre has an inner core and an outer covering or jacket also known as cladding. The refractive index of cladding a little less than that of the inner core , thus inner core is optically denser than cladding. An optical signal is projected at core such that it strikes cladding withan angle more than that of critical angle for the pair of refracting media, due to which it undergoes tir and then again on striking surface of cladding, it undergoes tir. Thus multiple tir takes place and signal is received at the other end of cable.

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