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 ...

Graham M. Gibson, Ermes Toninelli, Simon A. R. Horsley, Gabriel C. Spalding, Euan Hendry, David B. Phillips, Miles J. Padgett Proceedings of the National Academy of ...

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 ...

Investigators compared subtle changes in electromagnetic signal frequency, caused by the Doppler effect, to conclude that Malaysia Airlines’ missing Boeing 777-200ER routed south after contact was ...

The pitch of a blaring car horn rises as the vehicle approaches and falls as it moves away. That’s the Doppler effect, and it also occurs for electromagnetic radiation, enabling police to catch ...

At the time of its construction in the 1950s, the Dwingeloo Radio Observatory was the largest rotatable telescope in the world with a dish diameter of 25 meters. It was quickly overtaken in the ...