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In an optical fibre, the power drops by a factor of 10 approximately every 30 km. If the transmit power is 0. 35 W, how far will a signal be transmitted before the power is attenuated to 350 μW?

Respuesta :

mhanifa

Answer:

  • 30000 km

Step-by-step explanation:

First convert the transmit power into μW, considering 1 W = 1000000 μW:

  • 0.35 W = 0.35*1000000 μW = 350000 μW

Find how many factors of 10 the power dropped:

  • 350000 / 350 = 1000

Find the distance:

  • 1000*30 km = 30000 km

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