McqMate
| Q. |
Numerical aperture is constant in case of step index fiber. |
| A. | true |
| B. | false |
| Answer» A. true | |
| Explanation: numerical aperture is a measure of acceptance angle of a fiber. it also gives the light gathering capacity of the fiber. for a single mode fiber, core is of constant refractive index. there is no variation with respect to core. thus, numerical aperture is constant for single mode fibers. | |
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