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in optical fibre refractive index of inner parts is 1.68 and refractive index of outer part is 1.44 the numerical aperture of the of fibre is 1).5653 2).66533).76534).865 |
| Answer» in optical fibre refractive index of inner parts is 1.68 and refractive index of outer part is 1.44 the numerical aperture of the of fibre is 1).5653 2).66533).76534).865 | |