What is a radar weapon?

Radar gun is a portable device used to measure the speed of something, especially baseball or moving vehicle. Especially radar weapons are used by the police to catch speed and baseball coaches to measure the speed of throwing jugs. A typical radar weapon can be purchased online or at a sports store for about $ 100 (US dollars). The radar weapons invented in 1954 Bryce Brown and first used Patrolman Leonard Baldy in Chicago.

The radar gun works by jumping a radar from the object to be measured, and using the Doppler effect to derive its speed. They are also referred to as Doppler's radars. Perhaps you are familiar with the doppler effect by listening to a passing train or car-especially with a train whistle, it sounds more with the high split as the train approaches, and becomes a low playground when the train leaves, despite the fact that the pipe playground is objectively constant.

change in the playground is caused by movementThe object of the object of the object is caused by the movement of the object emission noise. When the object moves quickly towards the listener, the sound waves are compressed by the growing proximity of the object as it radiates the sound. When the object leaves, the waves are stretched by an increasing distance of the object as it emits the sound. The same principle applies to light, other forms of electromagnetic energy (such as radar waves) and any emitted wave.

works both as a radar emitter and the transmitter, the radar pistol emits the radar waves and analyzes them after the reception. This allows very accurate speed measurements, but the radar weapon may sometimes be a mistake when it raises the movement of the object in the foreground, such as a moving bird, rather than the intended target object. As a result of the risk of error, the police in many countries are required to complete the precise use of radar weapons and obtain certification.