# Answer on Optics Question for Umer

Question #18347

A 1-Gbit/s signal has an average power of 1μW at the receiver. What is the average energy in each pulse?

Expert's answer

Signal of 1 Gbit/s means10^9 pulses per second.

Power of 1μW means 10^-6 joules per second.

By diving, the energy of each pulse is

E = (10^-6 J) / (10^9) = 10^-15 J

Answer: 1 femtojoule

Power of 1μW means 10^-6 joules per second.

By diving, the energy of each pulse is

E = (10^-6 J) / (10^9) = 10^-15 J

Answer: 1 femtojoule

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