Scientists have detected the Doppler effect — a quirk of physics that makes an ambulance's siren change pitch as it drives by — on the scale of a single molecule. The Doppler effecthas been understood ...

Everyone has experienced the Doppler effect. An ambulance's siren has a higher pitch as it approaches you, and a lower pitch when moving away. Now, imagine that the pitch goes down as the ambulance ...

The Doppler shift of sound or light waves from a moving source is familiar to physicists and non-physicists alike. Now, researchers in China and Australia have seen the more exotic inverse Doppler ...

Everyone has experienced the Doppler effect. An ambulance's siren has a higher pitch as it approaches you, and a lower pitch when moving away. Now, imagine that the pitch goes down as the ambulance ...

Though many people may hear “Doppler Radar” as tool for tracking weather systems, it is used for much more and has roots in science dating back generations. The Doppler Effect, as it is known, is also ...

Expertise from Forbes Councils members, operated under license. Opinions expressed are those of the author. Imagine you're at the train station, waiting to catch the northbound train. It's a quiet ...

Radar is quite spectacular in telling us exactly where rain is falling by pinging precipitation with radio waves! Our weather radar can determine more than just a storm’s location, but its movement as ...

A twist on the physics that cops use to clock speeding drivers can determine how fast an object is spinning. The approach could be used to protect wind turbines from damaging winds, learn about ...

Sitting on the beach at Gecko Island one afternoon, A man finds himself beneath the flight path of the airplanes leaving East Blue Airport. a) What frequency will the man hear as a jet, whose engines ...