She also demonstrates a way to determine if an object is approaching or receding from the radar gun. The Doppler shift is one way to remotely measure the speed of an object. It works by ...

Finally, a physical embodiment of the Doppler effect radar is demonstrated with a pair of Vivaldi horn antennas and a copper sheet. We really like how [Shahriar] structures his video: theory ...

But, a new sort of radar gun may have us quickly singing their praises. The Virginian-Pilot reports that there's a new tool that will be able to tell officers if a driver is texting rather than ...

In 1989, at the International Players Championships in Miami, the sport debuted a device that didn’t call the serves, but timed them—a radar gun. Serve speeds like Tilden’s had been measured ...