Passengers aboard the Celebrity Xpedition cruise ship saw a textbook and amazing example of Kelvin-Helmholtz instability clouds as they departed San Cristobal Island. These clouds, which resemble ...

A new paper published in the journal Physical Review Research provides experimental support for the hypothesis that hand clapping essentially acts like a Helmholtz resonator—akin to the hum ...

The chosen solution in his thesis are Helmholtz resonators, which are a kind of acoustic spring. Using a carefully selected opening into the cavity, frequencies can be filtered out, and ...

Amy Hunter witnessed the Kelvin-Helmholtz waves, which usually form on windy days because of specific atmospheric conditions - and resemble waves tumbling across the sky. The extremely rare ...

Known as Kelvin-Helmholtz instability, they form when a faster stream of air moves above rising air below. Ms Gordon, who told BBC News she took the images from her parents' back door before ...

A photo of the Kelvin-Helmholtz clouds was captured by Joy Patrick looking out to the sea at Trimingham in Norfolk. She spotted them from her bedroom window on Sunday evening as the Eastern Daily ...