Eric Perry

 Since speeding in auto mobiles is so common in everyday life, people decided to use technology to help the drivers get away with it.  Detectors are legal in all states except Virginia and the District of Columbia. They're legal in the following Canadian provinces as well as: Alberta, British Columbia, New Brunswick, Nova Scotia and Saskatchewan.  On US military bases, they are legal to have but illegal to use.

 You first have to know what they are detecting.  A basic speed gun is a combination if a radio transmitter and a receiver in one component.  The radio transmitter oscillates while an electrical current so the voltage goes up and down at a certain frequency generating an electromagnetic energy and travels in the air as an electromagnetic wave.  The transmitter is also equipped with a amplifier to increase the electromagnetic energy.  Also the transmitter has an antenna that broadcasts the electromagnetic waves into the air.

 Radar is using the radio waves to monitor and detect various objects.  The simplest function of radar is to tell you how far away an object is.  To do this, the radar device emits a radio wave and listens for any echo. If there is an object in the path of the radio wave, it will reflect some of the electromagnetic energy, and the radio wave will bounce back to the radar device distorted.

 Radio waves move through the air at a constant speed (the speed of light).  The radar device can calculate how far away the object is based on how long it takes the radio signal to return.

 Radar can be used for to measure speed.  Just like sound waves, the omitted radio waves have a frequency (the number of oscillations per unit of time).  When the radar gun and the car are both standing still, the echo will have the same wave frequency as the original signal. Each part of the signal is reflected when it reaches the car, mirroring the original signal exactly.

 When the radar gun and the car are both standing still, the echo will be the same wave frequency as the original signal omitted.  Each part of the signal is reflected when it reaches the car, just like the original signal exactly.  When the car is moving, each part of the radio signal is reflected, changing the frequency of the waves creating peaks and valleys.  Based on the changing in frequency is how the speed is calculated

PASSIVEJAMMING THE SIGNAL They just detect the presents of the radar  The radar is picked up and sent back with additional radio noise making it so the police officer can’t get and accurate reading.

 Modern radar guns use a laser to detect the cars speed instead of using the waves.  It is more effective due to it don’t carry over long distances, so by the time it is detected, you are already in the sight of the beam.  Some speeding drivers have a black car since it absorbs more light or some my get special plastic covers that reduce the reflectivity of license plates.  They reduce the reduce the effective range of the laser.

 The police are constantly introducing new methods to catch speeders so that will make the current equipment old and not worth it.

 1. Are the wave distorted if none of the parties are moving?  2. True or False. A passive radar detector will distort the wave back to the police officer so they cannot make an accurate reading.  3. Are radar detectors 100% effective?

 1. No  2.False  3.No