Answer to Question #18347 in Optics for Umer
A 1-Gbit/s signal has an average power of 1μW at the receiver. What is the average energy in each pulse?
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