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An optical fibre consists of core of n surrounded by a cladding of n2 ni...

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An optical fibre consists of core of n surrounded by a cladding of n2 ni A beam of light enters from air at an angle a with axis of fibre The highest a for which ray can be travelled through fibre is 2 2 a cos n n 2 b sin n n c tan n n 2 2 d sec n n O n M

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