Find the minimum practical value frequency, Electrical Engineering

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A radar systemuses pulses of duration D tomodulate the amplitude of a radio carrierwave. The system can distinguish between targets spaced apart by a distance of d ≥ cD, where c is the velocity of light. In view of 1/100 ≤ B/fc ≤ 1/10, find the minimum practical value of fc so that dmin =
30 m.


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