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5 points An optical power of 0 5mW is initially launched into an optical fibre...

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5 points An optical power of 0 5mW is initially launched into an optical fibre The power level is found to be 0 0199mW after 4 km The attenuation coefficient in this fibre will be 1 5 dB km 2 5 dB km 3 5 dB km 345 dB km Save Answer

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