Laser guns and radar measurements

A widespread method, which is also increasingly used by the police for speed checks, for example, is laser measurement - can you do my homework . Light pulses are emitted from a device (laser gun). These are reflected by the approaching vehicle and picked up by the receiver integrated in the laser gun. The light pulses are emitted at very short intervals of about 0.02 seconds.

The distance can be determined from the time it takes a light pulse to travel there and back, since the speed of the light pulses is known. It is equal to the speed of light - do my engineering assignment , so it is about 300 000 km/s. From the change in distance from one light pulse to the next, the distance traveled is obtained. The time that elapses between the emission of two pulses is the associated time. This allows the speed of the targeted vehicle to be calculated and displayed directly. Similar to induction loops, the device can also be coupled with an automatic camera that is triggered when speeding occurs and records the traffic offender's vehicle.

Another method is radar measurement , which uses a different physical effect - https://domyhomework.club/buy-assignment/ , the Doppler effect. In a radar measurement device, electromagnetic waves of short wavelength are emitted, reflected by the vehicle and received again. If the vehicle moves away from or towards the measuring device, a frequency change occurs which is a measure of the speed of the vehicle.

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