A lidar (laser radar) gun is an alternative to the
Chapter , Problem 19(choose chapter or problem)
A lidar (laser radar) gun is an alternative to the standard radar gun that uses the Doppler eff ect to catch speeders. A lidar gun uses an infrared laser and emits a precisely timed series of pulses of infrared electromagnetic waves. The time for each pulse to travel to the speeding vehicle and return to the gun is measured. In one situation a lidar gun in a stationary police car observes a diff erence of 1.27 3 1027 s in round-trip travel times for two pulses that are emitted 0.450 s apart. Assuming that the speeding vehicle is approaching the police car essentially head-on, determine the speed of the vehicle.
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