railway RRB JE (CBT I + CBT II) Mock Test 2024 Electronic Devices Optical Devices

In optical communication using silica optical fiber, 1 nm spectral width at 1300 nm corresponds to a bandwidth of (assume refractive index of silica optical fiber = 1.5)

1
150 GHz
2
120 GHz
3
80 GHz
4
90 GHz
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