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In optical fibre, refractive index of inner part is 1.68and refractive index of outer part is 1.44. Thenumerical aperture of the fibre is(1) 0.5653(2) 0.6653(3) 0.7653(4) 0.86 |
| Answer» In optical fibre, refractive index of inner part is 1.68and refractive index of outer part is 1.44. Thenumerical aperture of the fibre is(1) 0.5653(2) 0.6653(3) 0.7653(4) 0.86 | |