These ripples are waves travelling through the water. Like ocean waves, these ripples are transverse waves because the surface of the water moves up and down, at 90° to the direction that the ...

acoustic and quantum-mechanical wave equations, to the equations describing linear waves (either gravity or capillary) on the water surface." The recent work by this team of researchers shows that ...

Scientists demonstrate controlled oscillations of quantum vortex core lines in superfluid helium, visualizing helical waves on quantum vortices.