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9 Using simple ray theory describe the mechanism for the transmission of light within an...

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9 Using simple ray theory describe the mechanism for the transmission of light within an optical fiber Briefly discuss with the aid of a suitable diagram what is meant by the acceptance angle for an optical fiber Show how this is related to the fiber numerical aperture and the refractive indices for the fiber core and cladding An optical fiber has a numerical aperture of 0 20 and a cladding refractive index of 1 59 Determine a the acceptance angle for the fiber in water which has a refractive index of 1 33 b the critical angle at the core cladding interface 10 Marks

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