(PhysOrg.com) -- Researchers from Swinburne University and the University of Shanghai for Science and Technology have for the first time ever demonstrated a reversal of the optical ‘Doppler Effect’ – ...

One way to measure a ship's speed is by usingDoppler Sonar.In the previous article, we introduced how Doppler Sonar can determine speed over ground or speed through water depending on the ...

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 ...

We know the Doppler Effect as the reason why horns and sirens drop in tone as they rush by us. But the Doppler Effect works on objects that are twisting around, too. We’ll tell you how the Doppler ...

So long as skiing and a trombone is involved, there is no such thing as a dull science lesson. For all of us who fell asleep during science class (I see you), the Doppler effect is the change in ...

When an ambulance passes with its siren blaring, you hear the pitch of the siren change: as it approaches, the siren’s pitch sounds higher than when it is moving away from you. This change is a common ...

Today's Google Doodle celebrates the 214th birthday of Christian Doppler, whose discovery of the Doppler Effect now helps us track thunderstorms, study distant galaxies, and much more. Doppler was an ...

Experimental physicist Prof. Thomas Zentgraf and his two colleagues from the University of Birmingham, Dr. Guixin Li and Prof. Shuang Zhang, have for the first time proved experimentally the nonlinear ...

Researchers have observed the inverse Doppler effect at optical frequencies, using a technique that combines a moving negative-index photonic crystal and heterodyne interferometry. In 1843, Christian ...

The Doppler effect is an observed change in pitch (how high or low a sound is) when either the source of the sound or the listener is in motion. Imagine a car, its horn blaring, approaching you as you ...

The International Isle of Man TT is a crazy motorcycle race. I mean—it's seriously ludicrous. They ride on public roads (yes, they are closed to normal traffic) such that you get these videos of bikes ...