railway RRB JE (CBT I + CBT II) Mock Test 2024 Electromagnetic Theory Waveguides and Guided Waves Optical Fiber
For which of the following reasons, losses in optical fibers can be caused?
1. Impurities
2. Attenuation in glass
3. Micro bending
4. Stepped index operation
1
1, 2 and 3 only
2
1, 3 and 4 only
3
1, 2 and 4 only
4
2, 3 and 4 only