Determine the attenuation per kilometer for a fiber whose length is 2 km, output voltage is 2.1 V at a wavelength of 0.85‚âà√≠¬¨‚à´m. The output voltage increases to 10.7 V when the fiber is cut-back to leave 2 metres. Determine the attenuation per km for the fiber at wavelength 0.85‚âà√≠¬¨‚à´m?#

Determine the attenuation per kilometer for a fiber whose length is 2

1.	Determine the attenuation per kilometer for a fiber whose length is 2 km, output voltage is 2.1 V at a wavelength of 0.85‚âà√≠¬¨‚à´m. The output voltage increases to 10.7 V when the fiber is cut-back to leave 2 metres. Determine the attenuation per km for the fiber at wavelength 0.85‚âà√≠¬¨‚à´m?#
A.	2.8dB/km
B.	3.1dB/km
C.	3.5dB/km
D.	8dB/km
Answer» D. 8dB/km