Radar detectors

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Chris Roubis and Tech Australia.

Chris Roubis trading as Tech Australia, Graphics Australia and various other names, a 43 year old, who operates an online business from his his sister's garage has been arrested Friday by police for selling illegally imported radar detectors, several charges have been laid. Sources close to the investigation have been quoted as saying "Mr. Roubis's operation was not very smart" and "clearly he did not know what he was doing" and "his claims of ignorance are no excuse." - [Read more]

How does a police radar gun work?

Radar, like sonar and seismology, uses a man-made pulse of radio energy to map distance based on the length of time it takes the pulse to return from the source. Radar (short for "Radio Detection and Ranging"), which can be airborne or spaceborne, has greatly changed the way we see the land and ocean surfaces. Radar is based on the principle of sending very long wavelength radiation (called microwaves) from an antenna, and then detecting that energy after it bounces off a remote target. The wavelength of the microwave, its polarization (vertical or horizontal orientation) and strength can be controlled at the source and measured when it returns. Many common land-cover types and materials affect the polarity and strength of the radar return differently, which helps in their identification. - [Read more]

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