For a single mode optical cable with 0.25 dB/km loss, the optical powe – McqOptions

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1.	For a single mode optical cable with 0.25 dB/km loss, the optical power 100 km from a 0.1 mW source will be _______.
A.	-30 dBm
B.	-35 dBm
C.	-40 dBm
D.	-45 dBm
Answer» C. -40 dBm

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