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| Q. |
How does the refractive index vary in Graded Index fibre? |
| A. | tangentially |
| B. | radially |
| C. | longitudinally |
| D. | transversely |
| Answer» B. radially | |
| Explanation: the refractive index of the core is maximum along the fibre axis and it gradually decreases. here the refractive index varies radially from the axis of the fibre. | |
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