A doppler radar is used to determine the speed of a moving vehicle by measuring frequency shift of the wave reflected from the vehicle. a) assuming that the reflecting surface of the vehicle can be represented by a perfect conducting plane, and the transmitted signal is a time harmonic uniform plane wave of a frequency f incident normally on the reflecting surface, find the relation between the frequency shift delta f and the speed v of the vehicle. b) determine v both in (km/hr) and (miles/hr) if delta f